Omega 2.4Mhz Megaquartz – Collected Pictures and Facts

November 14th, 2011


(Picture by CFR from the WUS forums)

I’ve been fascinated by Omega’s early quartz watches for a couple of years now and have a pretty decent collection of my own…going by the movement numbers : 1230, 1250, 1300, 1301, 1310 (x2), 1342, 1441, 1445, 1510 (x2), 1525, 1665, 1680. Their most advanced watches were those based on the 2.4Mhz 151x movements of course and while I don’t pretend to have the same knowledge on the subject as dickstar1977 who’s written about them in many excellent posts over the years and most recently in Omega Megaquartz F2.4Mhz, A Dream Come True, I thought I’d try to contribute by sharing the pictures and facts I’ve collected concerning the different versions, so here goes.

Starting from a list posted by dickstar1977 on WUS at some point, I’ve numbered them and added the prototypes and related topics. Note the missing versions, if you have pictures of them, please post them !

INDEX:
0.1500 Elephant (dickstar1977)
0a. 1500 Elephant prototype 2 (Omega)
0b.1510 Prototype (JonW)
0c. 1510 Prototype 2 (Omega)
1.1510 Stardust SS
2.1510 Stardust 18K and bracelet
2b. 1510 Stardust 18k and strap
3.1510 Blue dial SS
4.1510 Blue dial 18K – No picture available – To be Confirmed
5.1510 Waffle blue SS (flame SC 05/2011)
6.1510 Waffle brown SS (dickstar1977)
7.1510 Waffle Black SS (JonW)
8.1510 Waffle brown 18K – No picture available – To be Confirmed
9.1511 Marine Chronometer SS and 14K
10.1511 Marine Chronometer SS and SS Bezel (France) – ok
11.1516 Marine Chronometer SS and 14K
12.1516 18K with 18K white gold bezel

13. Difference between 1511 and 1516
14. Original and New bracelet
15. Links

PICTURES:

Starting with the prototypes, here are a 1500 prototype, the “Elephant”, owned by dickstar1977 and also on display at the Omega museum in Bienne and a 1510 prototype owned by JonW. Both sourced on eBay. There are likely other prototypes that survived (notably with the 1515 movement) but they must be locked up somewhere in Bienne!

0. 1500 Elephant
A mid-2011 acquisition by dickstar1977 and he wrote brilliantly about it here : >> LINK<<. Following two pictures by dickstar1977

From the eBay auction :

At the Omega museum in Bienne:

From “Omega – A Journey Through Time” :

0a. 1500 Elephant prototype : same hands as the known 1500 Elephant prototype with a different case, could just be a drawing.

0b.1510 Prototype
Owned by Jonw who talked about it here recently.

0c. 1510 Prototype – from “Omega – A Journey Through Time” : hard to tell if it’s an actual watch or just a design? Interesting dial for sure!

1.1510 “Stardust” SS
This is probably the most striking version thanks to its unique dial made of Aventurine (a greenish quartz apparently) that looks a bit like Lapis Lazzuli (a gemstone). Omega resurrected aventurine on a recent Speedmaster but to somewhat less effect. As described in detail by Piotr on his cazywatches site it is very fragile (tends to crack, but hairline cracks are from the lacquer and are ok as explained by “flame”) but it seems to be the most readily available version with the 1510 available these days.


(sorry credit unknown)


(Picture by CFR from WUS)


(Picture by dickstar1977)

A cracked stardust dial…

2.1510 Stardust 18K and bracelet
Same dial as above but this time with a solid 18K case and bracelet, stunning ! Actually the dial is a bit different as the hour markers are now golden instead of white/silver, pictures by CFR :

Forum member flame owns an 18k Stardust on 1510 now fitted on a strap with a 9k plated No27 deployant that was originally sold with an 18k bracelet. Based on their vintage site, it doesn’t appear that Omega sold it in this configuration but the combination works well.

3.1510 Blue dial SS
This version uses a metallic blue dial similar to the one of the Electroquartz “Pupitre” (1300 caliber) although maybe a bit “greyer”. I also have a Seamaster with caliber 1310 with that type of dial. They must have been produced in lower quantities than the Stardust version because they are quite rare these days with 5 known examples : one owned by toshi, one I own, two that dickstar1977 owned and one that was sold on eBay in 2010. Was apparently available on a leather strap (1215 reference with No27 deployant or a standard buckle).


(Picture by Toshi)


(Picture by disckstar1977)

4. 1510 Blue Dial 18k : No picture available – To be Confirmed

5.1510 Waffle blue SS
On to the so called “Waffle” dials that are even rarer than the metallic blue version. Possibly because they don’t age well with cracking and discoloration. The first one is the blue version once owned by flame and that seemed to have held up well over time :

(Pictures by flame)

6. 1510 Waffle Black SS
Blue or black it’s a bit hard to tell the difference, color shifting over the years?


(Picture by JonW)


(Picture by JonW)

7. 1510 Waffle Brown SS
On to the “brown” version that may in fact be the black/blue version that has lost its original color as shown in JonW’s picture below.


(Picture by dickstar1977)


(Picture by Jonw)

9, 11 and 13. 1511 and 1516 Marine Chronometer SS and 14K
Moving on to the “Marine Chronometer” versions of the 151x movement that were all certified over the years by the Besançon Observatory but only a couple by the Neuchatel Observatory. While a “Marine Chronometer” certificate looks good on paper, there’s no evidence that the 1511 movement was any different than the 1510 movement and with the rather lax Marine Chronometer certificate requirements in the early 70s (they were made for mechanical watches with an authorized daily drift of 0.3 seconds per day) it’s likely all the 1510 movements would have made the grade too had Omega submitted them as well. In fact I’ve seen a certificate for a 1510 movement for a 1511 version…The biggest difference of course with the 1510 is the case design…and price at the time.

There were two batches, the 1511 and the later 1516 with some minute changes that CFR analyzed a few years ago on Watchuseek with pitures reproduced below. In essence the case was somewhat shortened, the crystal was now a saphire instead of mineral and movement details changed:

10. 1511 Marine Chronometer SS and SS Bezel – FRANCE
This version is much rarer and I’m only aware of two having survived. I’ve heard of two reasons that led Omega to remove the 14k bezel and plate. The first one being that 14k gold was not allowed in France and the second one because solid gold required a visible hallmark and they were not willing to place one on the bezel or the number plate. Take your pick !


(picture by Corsaire)

Next to its bigger/younger sister, the 1525 OMC:

12.1516 18K with 18K white gold bezel : the only picture I’ve seen (or Google for that matter) is in the “Omega – A Journey Through Time” book for this OMC with serial number 37058875. According to the book, this version was a special order by Gameo (Omega Agent General for Switzerland) to the Fontana case factory in Sesto Calende, Italy.

14. Original and New bracelet
The original stainless steel bracelet for the 1510, 1511 and 1516 models was the 1209/202 reference with solid heavy links. Later on it was replaced by the 3018/202 with hollow light links and it now appears to be sold under reference 3019/202. It can be found at Ofrei ($242+Tax) in the US and CousinsUK (£117 + VAT) in Europe. I got one from Ofrei (before I found out CousinsUK also had it) for my Stardust as the original bracelet was rather beat (stretched and scratched) it does the job even though it isn’t as hefty.

Again all credits go to CFR :

15. Links
- dickstar1977′s Omega Megaquartz F2.4Mhz, A Dream Come True
- Piotr’s website : Megaquartz 1510, OMC 1511/1516
- Calling all OMC owners on WUS : Omega 2400 Marine Chronometer Project — Calling all owners!
- JonW’s New Arrival… Omega Disco Fever! Mirror Ball Watch
- dickstar1977′s The rarest Audemars money can buy? Quartz haters look away (same 2.4Mhz movement)

FINAL WORDS
Thanks for reading and I hope it will help get an understanding of Omega’s great 2.4Mhz project both for existing and future fans of these watches!

Saying goodbye with my two 151x’s (a 1511/1516 has to be in my future :pardon:)

Battery life of Vintage Quartz – Mercury Free

September 22nd, 2011

I was researching the battery life of my Omega Megaquartz 2.4Mhz after being a bit concerned to see a fresh Renata 344 battery last less than a year and I found an interesting Omega bulleting issued when the Mercury batteries were phased out. Not only does it give the exact reference of the replacement battery but it also specifies the new battery life, reduced due to the switch from 1.35v to 1.55v, here is the link for the PDF : http://tinyurl.com/omegabattery

For the 151x :
Old/354 1510/11/16 9903 354 Renata 1.35 190 mAh ø 11.6 x 4.2 mm 14 μA 18 months
New/386 1510/11/16 9908 386 Renata 1.55 130 mAh ø 11.6 x 4.2 mm 14 μA 12 months

So with my 344 and its 105mAh capacity, battery life would be around 9.5 months, phew, I was getting concerned there was something wrong with it. Now to get a 386 to test that out over a year!

My Omega Double Eagle (1513.30.00) with Calibre 1680

February 11th, 2011

I finally got an Omega Double Eagle (1513.30.00) late last year and have really taken to it. It is powered by the High Accuracy Quartz Calibre 1680 (ETA 252.511)  with a perpetual calendar programmed until 2100, a time-zone adjustment (doesn’t interfere with the seconds hand) and has a battery that’s good for 5 years. Unfortunately Omega discontinued it sometime in 2009, possibly because it interfered with the sales of the similarly styled automatic co-axial version…

It’s just the right size for me at 38mm (I have the larger model) and you can’t beat the digital calibration terminal with steps of +/- 4 spy. Since it doesn’t have the large 3v battery of its cousin the Longines VHP, it’s a breeze to adjust it. When I got it, it was running at a poor +4spm but with 12 taps I got it back within specs and a couple of taps later I now have it tweaked to my liking.

I’ve found the variation between room/worn (14 hours a day) is about 7 spy (-4/+3 ), consistent with the 10 spy between room/warm of the Longines VHP. Omega rated it at a very conservative +/- 0.055 seconds per day, i.e. +/- 20spy, versus +/-10spy per ETA (it’s the ETA 252.511 movement).

Also of interest, it has a magnetic shield, just like the Omega Speedmaster, first time I see that on an HEQ!

There are no micro-adjustments on the bracelet (always a concern to me) but Omega were smart enough to make the half-link slightly shorter than the actual half of a link so that gives some flexibility.  In effect, I was able to use two half links instead of one link to get it fitted properly.

Questions, comments? There is a topic fo that in the forums : http://www.bestofwatch.com/forums/viewtopic.php?f=2&t=17

High End Quartz (HEQ) – Accuracy : room/warm/worn

November 16th, 2010

1. The Accuracy varies with the Temperature
It’s been long known that while quartz powered watches have superlative accuracy compared to mechanical watches, to the order of +/- 15 spm (seconds per month) versions -4/+6 spd (seconds per day) for COSC certified mechanicals, their accuracy is impacted by temperature as with the quartz crystal expanding and contracting, every so slightly. There are various schemes, called “thermocompensation”, to mitigate temperature variations as explained in great detail in Thermocompensation: Methods and Movements in the Watchuseek HEQ forums. These schemes are not perfect though and manufacturers generally recommend the watch be worn around 12 hours a day so that they rated accuracy is met.

2. Testing the Accuracy : room and warm temperatures
Earlier this year, fellow HAQ (High Accuracy Quartz) fan Catalin started doing testing at simulated temperatures, room, warm (placed on his router). Interested by the “real life” approach : “room” when the watch is stored and “warm” for when the watch is worn, I followed suit and have been testing my own HAQ watches, up to the recently released Bulova Precisionist. Here are my results :

Image

What prompted this post is that thanks to varying weather conditions I was able to test the Precisionist (and the Seiko SBCM023 with the 8F35 movement) at several temperature points between 23 degrees Celsius and 36 degrees Celsius and saw a clear pattern in the y=aX+b form. The variations are fairly significant but let’s keep in mind that these watches rely on a “simple” thermocopensation scheme : (relatively) high frequency quartz, 262khz for the Bulova and 196Khz for the Seiko, 8x and 6x respectively the frequency of “ordinary” quartz watches (32khz).

3. “Real Life” Accuracy
I was assuming that the accuracy obtained at 30dC would be the “real life” accuracy when wearing the watch, something I proceeded to verify by wearing the watch for 14 hours a day for two weeks for the Bulova and one week for the Seiko.

Continued in High End Quartz (HEQ) – Accuracy : room/warm/worn  in the forums.

Bulova Precisionist Accuracy Testing : Summary and Chart

October 23rd, 2010

Updated November 16th, 2010 :
An update for the actual “worn” temperature after two weeks of wearing the watch 14 hours a day, and the results are excellent : +1.1 seconds per year equivalent with an error margin of about 1spy.

This is quite a bit better than what could be expected looking at the graph below, but this shows that the “worn” temperature is quite a bit lower than the “warm” simulated temperature of 30 degrees Celsius. More discussion of that in the new High Accuracy Quartz – Accuracy : room/warm/worn topic.

Posted October 23rd, 2010 – After nearly a month of accuracy testing of the new Bulova Precisionist at room temperatures and at warm temperatures, I think I now have a good idea of its accuracy and of the way it reacts to temperature changes. A picture (or in this case a graph) being worth a thousand words here is what the results look like :

This graph shows that the accuracy is excellent at room temperature but slowly degrades as the temperature goes up, very much like the Seiko 8F35 I used for comparison purposes. Higher end high-accuracy watches based on the ETA or Citizen movements typically show a variation of about 10 spy (a bit less for the Citizen) between room/warm temperatures, versus 30 spy for the Precisionist.

Using the data in the table, the approximate rate for a wearing pattern of 14 hours a day would be (14x-23+10×6)/24)=-11spy, close enough from the +/-10 spy claimed by Bulova. I will try to verify this value over the next few days by wearing the watch using this pattern.

More details in the forums in Bulova Precisionist Accuraty Testing : Summary and Chart in the “Technical Forums” where you can also say how accurate your Precisionist is.

Bulova Precisionist Movement Pictures and Info – P102, 8 jewels

October 15th, 2010

After owning the Bulova Claremont for a couple of weeks I decided it was time to take a chance and try to crack the snap-on back open…using a case opener I realized I was getting a good grip on the “indentation” in the back so I went for it and…pop went the back ! Here’s what it looks like inside :

.

More pictures and info on the markings in the Bulova Precisionist Movement Pics and Info – P102, 8 jewels topic in the “Watch Movements” section of the “Technical Forums”.

Bulova Precisionist Accuracy – Warm Temperature Testing : -25/-50 spy [UPDATED]

October 2nd, 2010


Results for Days 2+1+7 – Warm Testing : After one full week at “high” temperature (about 36° C) the Claremont Precisionist turns in a rather disappointing result at -53 spy, showing it is not very thermo-insensitive and Bulova’s claim of +/-10spy without any wearing constraints in the “manual” or on their website doesn’t seem like it can be met.

I will do some more testing at the same temperature with my Seiko 8F35 placed next to the Bulova to see how they react.


Results for Days 2 – Warm Testing : Day 2 of testing at warm temperatures and the trend of the first 24 hours of -25spy was confirmed during day 2 with -23spy. So far we have a variation of about 30spy between the accuracy when worn 24 hours a day of -25spy and the accuracy when placed at room temperature of +5spy. This is slightly outside the +/- 10spy rating but remains a solid performance. More details in Bulova Precisionist accuracy – Warm Temperature testing in the forums.

Results for Days 1 – Warm Testing : As explained yesterday I have now moved on to the simulated warm temperature testing to replicate the temperature conditions when a watch is worn. This will give a sense of its thermal insensivity, a must for a high-accuracy quartz watch.

After 24 hours, the accuracy has dropped to -25 seconds per year (spy) compared to +4spy at room temperature. Keep in mind that this is only a trend as the accuracy of the video method after 24 hours is about 14spy.

The amplitude so far is of about 30spy, a bit more than the rated amplitude of +/- 10spy and of the 25spy average amplitude of the Seiko 8Fxx movements rated at +/- 20spy.

Stay tuned for an updated table in the forums tomorrow in Bulova Precisionist accuracy – Warm Temperature testing and feel free if you have any questions of suggestions.

Bulova Precisionist Accuracy – Room Temperature Testing : +4 seconds per year [UPDATED]

September 27th, 2010

Results for Days 4 and 5 : No unexpected variations these past two days today with a drift over 5 days at room temperature of +4 seconds per year* so I’ll be moving on to the “worn temperature” testing. I’m curious to see the impact of temperature variations on this movement, especially since Bulova have not specified any wearing pattern to achieve the +/- 10spy accuracy, unlike most (all ?) manufacturers of high accuracy quartz watches.

I have now placed my my 96B127 Precisionist on top of my router and will check the drift in 24 hours.

* over 5 days, the accuracy of the video method is of +/- 3spy


Results for Day 3 : Nothing spectacular today, but over 72 hours with an accuracy of 4.9spy for the video method (resolution of 0.04 second), the cumulative drift is become more meaningful and it is so far excellent at +2.3spy, see the Bulova Precisionist accuracy testing – Days 1, 2 and 3 post in the forums for more details and a graph.

Results for Day 2 : some slight “swings” on day 2, which is to be expected given the short period of observation and we are now between +0.2 and +3.8 spy over 48 hours, see the Bulova Precisionist accuracy testing – UPDATED post in the forums for more details.

It’s been 24 hours since I started testing my 96B127 Precisionist for accuracy using the video method and so far it’s looking good!

Testing was done at room temperature, which would have averaged around 25 degrees celsius over the past twenty four hours and depending on what “marker” I’m looking at, the accuracy varies between - 3.78 seconds per year and +2.75 seconds per year (spy). I’m using different markers since the seconds hand does not stop once per second as other quartz watches, so it’s a bit of a moving target.

At this point this should only be considered to be a trend as the video method has a resolution of 1/25=0.04 seconds, which amounts over 24 hours to 14.6spy (2spy over a week) so the current results are within the error range of this method. Nonetheless this is a good start and shows that there is no large error at play.

The plan is to keep on testing the watch for a week at room temperature and then to move to a simulated “worn pattern” temperature (placed on top of a router) to get a sense of its handing of temperature variations.

If you have any questions, feel free to use the new forums : Bulova Precisionist accuracy testing – first report!

Bulova Precisionist now Available – First Impressions

September 26th, 2010

After a long wait, the Bulova Precisionist watches launched at the Basel Trade Show in March are now available in the USA, at Macys at least. I found out first hand when I walked into the store on Union Square in San Francisco :

After looking at pictures I was sold on the Claremont with a stainless steel bracelet and a black dial (reference 96B129) but after seeing it today I went for the “strapper” (reference 96B127), much lighter (the SS feels really heavy and with no fine setting, only half links, I was concerned it would slip around) and the inner bezel is silver which matches the “circle” on the dial.

Macys have 20% off many watches this week-end, including Bulovas!

FIRST IMPRESSIONS :

Not sure if it’s the case for all the models but this one has a snapback, generally not easy to remove at least without leaving any marks…will have to wait for pictures of the movement.

The manual is totally generic and useless, zero technical info and they even write that the battery should work for a year (isn’t it 3 ?). Shame on Bulova for not giving a toss about that aspect. The sales guy showed me the pitch he was given, 10 seconds (he originally said it was 15 seconds so I thought they’d backed out a bit…), smooth sweeping, etc…

About the smooth sweeping, it seems to be less smooth than what I remembered from Basel although its hard to tell from the video I had posted here. You can definitely see the “ticks” unlike on an Accutron or a Seiko 5S21, a bit like on a 36000 like the Seiko Lord Master.

The lume is weak, it’s only partly applied on the hour and minutes hands, none elsewhere, the numbers on the dial looked like a good place to have some though.

Oh and of course I set it tonight and started a video test, not easy with the smooth sweeping second hand, but I’ve got some practice with the Omega f8192hz, and I should have a first trend at room temperature within 24 hours.

PICTURES :

Feel free if you have any questions.

The Omega Seamaster Quartz Mariner Saga – I, II and III

May 10th, 2010

For some reason I’ve recently become fond of the Omega “Mariner” watches of the late great 70s so I thought I’d put my notes together not having found an existing article on the subject.

Here’s what I have so far :
1. Mariner (I) : Mens Cal. 1310 – Ladies Cal. 1320
2. Mariner II : Mens Cal. 1320 – Ladies Cal. 1320
3. Mariner III (?) – Mens Cal. 1343

…and of course the great mighty : OMC ;-)

Let’s dig in with the appropriate quotes from Omega’s vintage site, currently being refurbished, but still available in its old version.

1. Mariner (I) :
a. Mens

Case ref. (watchhead) = 196.0054
Case : octogonal (11,7 x 39 x 42 mm), with 4 screws on bezel and Omega Quartz plate at 6 o’clock.
Bracelet : stainless steel, integrated, ref. 1268/241
International Collection : 1975-1981
Swiss retail price (1977) : CHF 1’000.-

Notes : there were some variations with a SS bezel and Quartz/Omega “plaque” and some certified as chronometers (Red Emblem)

b. Ladies
I saw this one on eBay and I can’t find it on Omega’s vintage site oddly enough

Some info :

- Caliber 1320 (like the Mariner II)
- Dimensions : 35mm x 31mm
- Reference : ST 396.0842
- Case : 196.0056
- Dates : model below is from 1976

2. Mariner II
a. Mens

Case : rectangular (11,1 x 29 x 39 mm), stainless steel with 14K solid gold bezel and plate, with attached SS bracelet of ref. ST 1267/241 or leather strap of 19 mm lug-size.
Case ref. = ST 196.0050
International Collection : 1976-1980
Swiss retail price (1976) : CHF 990.- (on steel bracelet)



(Picture by Omegary)


b. Ladies
(?)

Case : octogonal (10,8 x 30 x 36 mm), with 14K yellow gold bezel and plate.
For SS bracelet of ref. 5942/241 or leather straps of 19 mm lug-size.
Case ref. : 196.0055
International Collection : 1976-1978
Swiss retail price (1977) : CHF 856.- (on leather) or CHF 990.- (on SS bracelet)

2. Mariner III
I’m calling it III because of its appearance but it is not its official name and again it’s nowhere to be found on Omega’s vintage site.
Some info :
- Caliber 1343
- Date : 1979 for that particular model (45281624)
- Dimensions : 40mm x 31mm
- Reference : ST 398.0854
- Case : 198.0019

…and the mighty OMC (Omega Marine Chronometer)
seen next to the Mariner II (picture by S.L.)

Looking forward to your comments !