WatchUSeek Watch Forums banner
1 - 20 of 33 Posts

·
Registered
Joined
·
124 Posts
Discussion Starter · #1 · (Edited)
Hi everyone, this is my first post in this forum and it is about my Omega Seamaster.
Are you aware that Omega has used the ETA 255.561 (Omega caliber 1441) movement in its titanium Seamaster in the late 1980s?
Link: http://www.isozaki-tokei.com/syuri-omega2.htm
This is the same dual-oscillator thermocompensated movement that was first introduced in the Longines Conquest VHP in 1984.

I own a stainless steel version of the Seamaster Professional 200m quartz (Omega caliber 1438 = ETA 255.461) and I also have a damaged Longines Conquest VHP (dial and hands are seriously damaged) with working electronic module. So I replaced the electronic module of my Seamaster with the electronic module (including the dual-oscillator) of the damaged VHP. So I ended up with a thermocompensated Omega Seamaster!
I’m going to follow the calibration instruction to fine-tune the movement.
I’ll keep the forum updated about the result of the calibration.
 

·
Registered
Joined
·
18,181 Posts
The use by Omega of the dual xtal movement was news to me! Swapping around ETA quartz movements of the same size is not difficult... and often represents a much easier solution than massive repairs.

Good luck on the calibration!! (If you want to sell some links off the Longines, please send me a PM... mine's way too small and Longines is no help anymore on bracelets that are not in production -- one of the differences between Longines and Omega.)
 

·
Banned
Joined
·
3,654 Posts
The use by Omega of the dual xtal movement was news to me!...
Me too! Just in case that there is no misunderstanding, the Omega Seamaster (Cal.1441) operation manual confirms it (see attachment from the net) and it also mentions that the quartz thermometer (the second oscillator) has a frequency of around 262kHz (the first time I saw that detail in an official booklet)!
 

Attachments

·
Registered
Joined
·
18,181 Posts
Very interesting! I think this is the first time we have a frequency for the second oscillator... good find!
 

·
Banned
Joined
·
3,654 Posts
Great work, how's the accuracy?

Fats:-!
Looks like (according to the thread opener) he just done the calibration so it might take a while to see the result of it.
I look forward to it as well!
 

·
Registered
Joined
·
183 Posts
I am very interested in your post, since I also have a SMP 200. What strikes me is that you have stated that your SMP 200 used the Omega Caliber 1438, but when I e-mailed Omega with the SMP's serial number number they told me that it used the Caliber 1538. Can you provide the reference number for checking? Mine is a 2850.50.02.

Hi everyone, this is my first post in this forum and it is about my Omega Seamaster.
Are you aware that Omega has used the ETA 255.651 (Omega caliber 1441) movement in its titanium Seamaster in the late 1980s?
Link: http://www.isozaki-tokei.com/syuri-omega2.htm
This is the same dual-oscillator thermocompensated movement that was first introduced in the Longines Conquest VHP in 1984.

I own a stainless steel version of the Seamaster Professional 200m quartz (Omega caliber 1438 = ETA 255.461) and I also have a damaged Longines Conquest VHP (dial and hands are seriously damaged) with working electronic module. So I replaced the electronic module of my Seamaster with the electronic module (including the dual-oscillator) of the damaged VHP. So I ended up with a thermocompensated Omega Seamaster!
I’m going to follow the calibration instruction to fine-tune the movement.
I’ll keep the forum updated about the result of the calibration.
 

·
Registered
Joined
·
124 Posts
Discussion Starter · #11 · (Edited)
I am very interested in your post, since I also have a SMP 200. What strikes me is that you have stated that your SMP 200 used the Omega Caliber 1438, but when I e-mailed Omega with the SMP's serial number number they told me that it used the Caliber 1538. Can you provide the reference number for checking? Mine is a 2850.50.02.
Ras44
Sorry,but i cant check the reference number,the watch is made in 1991 and not me is the first owner
As you see on the pictures,the mechanical part at the two movement is the same,ETA 255.461
The electro module is the different,this is becouse Omega is give that another caliber number.
As far as i know the Omega 1438 caliber appears in 200m SMP.
The Omega 1538 caliber is in the 300M SMP. (James Bond Omega).
No one of them is thermocompensated movement.
The thermocompensated movement: Omega 1441

I put some link to the topic:

http://mr-coo.com/battery/brand/seamaster-1438.html

http://chronocentric.com/forums/omega/index.cgi?noframes;read=2495

http://home.xnet.com/~cmaddox/omega/tables/seamaster/combined.html#Electronic_Divers

http://mr-coo.com/battery/brand/seamaster1441.html
 

Attachments

·
Registered
Joined
·
183 Posts
Thanks a lot for the detailed answer. Well, like you, I thought my watch had the 1438, but it appears that, maybe, just maybe, 1992 models got the 1538, and it seems like mine is a 1992 model. I say that because I asked Omega and they wouldn't tell me the production year of my watch. Other than that, which I understand, they were very courteous with me. If you would like the reference number for your watch, just e-mail them ( [email protected] ) with the serial number of your watch and they will provide the reference number. Here is a copy/paste of the communication:

Dear Mr ------,

We thank you for your e-mail and wish to congratulate for having purchased an Omega watch.

The serial number you provided us with corresponds to the following model:

·Reference 2850.50.02
·Model Seamaster 200M Gents watch
·Calibre 1538 Quartz

We hope that the above information is satisfactory and wish you much pleasure with your new OMEGA watch.

With kind regards,

Maria Mastrodonato
INTERNATIONAL CUSTOMER CARE
Ω OMEGA SA
RUE STAEMPFLI 96
2500 BIENNE 4
SWITZERLAND
[email protected]
www.omegawatches.com


Ras44
Sorry,but i cant check the reference number,the watch is made in 1991 and not me is the first owner
As you see on the pictures,the mechanical part at the two movement is the same,ETA 255.461
The electro module is the different,this is becouse Omega is give that another caliber number.
As far as i know the Omega 1438 caliber appears in 200m SMP.
The Omega 1538 caliber is in the 300M SMP. (James Bond Omega).
No one of them is thermocompensated movement.
The thermocompensated movement: Omega 1441

I put some link to the topic:

http://mr-coo.com/battery/brand/seamaster-1438.html

http://chronocentric.com/forums/omega/index.cgi?noframes;read=2495

http://home.xnet.com/~cmaddox/omega/tables/seamaster/combined.html#Electronic_Divers

http://mr-coo.com/battery/brand/seamaster1441.html
 

·
Registered
Joined
·
183 Posts
Thanks a lot for the information! The serial number matches with the 1991 model year, but of course the guide tells that it could be off about 1 or 2 years. Well, the mystery won't be over till I open the watch, and I think there's about a year of battery life left on my watch. Still, thanks a lot for the great information and congratulations on your thermocompensated SMP 200! The SMP 200 is pretty rare itself among the Seamaster Professional series, a thermocompensated one is a gem!

The production year of watch:
I put some link to the topic:http://home.xnet.com/~cmaddox/omega_serial_numbers.html
 

·
Registered
Joined
·
124 Posts
Discussion Starter · #15 ·
Great work, how's the accuracy?

Fats:-!
Hi all,now after the 5th week use,i tell you how the calibration worked.
To a radio controlled clock there is no difference neither + or - way.I'm curious how the Omega Seamaster 1441 movement works for a year.sorry for my english:-(
 

·
Registered
Joined
·
18,181 Posts
Good job! and good luck! (... and your English is OK too.)
 

·
Banned
Joined
·
3,654 Posts
Hi all,now after the 5th week use,i tell you how the calibration worked.
To a radio controlled clock there is no difference neither + or - way...
Congratulations, excellent result!:-!
 
1 - 20 of 33 Posts
Top