Vintage 1920´s gold plated cushion case chess dial Omega

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Beautiful watch. The only danger I’d see is that I’d constantly be staring at that dial! You do need to be careful of door frames, bedside table tumbles as this probably has no anti shock. Just because its almost a 100 years old, does not mean It can’t be accurate. Find a competent watchmaker.
 
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Thank you larry.
Yes I am very careful, specialy with door frames like you say 😀
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2 minutes a day is not acceptable for any watch with a Swiss lever escapement, even if it is an old vintage. But maybe the movement is in pour condition and there were parts issues.

By the way, if that is possible, I would like to see the movement and the case back of your watch!
Hi Francois
I have finally overcome my fear and decided to open the case back
Here are some photos. what doyou think?
I may turn the racket towards the - sign myself
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Hi,

Caliber 26,5 and gold plated Swiss made case. Movement and case both are from the early 30’s. So everything looks good! The case is a little bit worn, but that was to be expected.
 
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Hi,

Caliber 26,5 and gold plated Swiss made case. Movement and case both are from the early 30’s. So everything looks good! The case is a little bit worn, but that was to be expected.
Merci Francois.
Should I have a go and try to set it up myself?
 
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+2 mins/day I think is very acceptable

It's also very easy to adjust the timing, if you google "Watch Tuner" on app stores, you can also make your phone listen to the watch and see more info about the beat

If there's a beat error, like 2+ ms - it might be more erratic I guess

But my opinion is, +2min/day is acceptable, just correct it every day
Thank you Kaplan.
Is Watch Tuner Lite good enough for my purposes or should Iget Watch Tuner?
 
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You can try to adjust the timing thanks to the regulator. But if the watch does not have a consistant time keeping, it will not solve the problem. And your watchmaker could then say he is no longer responsible as you tinkered the watch. I would bring it back to him for a check-in. At least he could show you timegrapher results - which would be more reliable than the ones you would get thanks to an iPhone app.
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You can try to adjust the timing thanks to the regulator. But if the watch does not have a consistant time keeping, it will not solve the problem. And your watchmaker could then say he is no longer responsible as you tinkered the watch. I would bring it back to him for a check-in. At least he could show you timegrapher results - which would be more reliable than the ones you would get thanks an iPhone app.
Thank you Francois.
I couldn´t resist it and I hace already adjuted the regulator, ever so slightly....
Will let you know how it goes
 
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Lots of good manufacturers of open end straps. (you can also search here) As cools as your strap is, its a liability now because its damaged.
 
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Lots of good manufacturers of open end straps. (you can also search here) As cools as your strap is, its a liability now because its damaged.
Thanks Larry,
I´ll have a look
 
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Need some help!
I have been turning the regulator gradually in the last couple of days towards the "S" side and is still running fast.
Can I carry on moving it further until the watch runs slower?
How far can I go?
I enclose photos from before and how it is now
Thanks
 
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The regulator is already at the maximum possible to the "law" side. Actually, it is way too much. I would bring the watch back to my watchmaker, as there is definitely an issue. After a proper service, even if the watch does not keep perfect time because of the lack of parts or other issues, the regulator should be around the middle of the balance cock.
 
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What would that mean?
The length of the balance spring (among other factors) determines the rate of the watch. Shorten the balance spring, and it runs faster. It would mean installing a new one and getting it "vibrated"; specialized watchmakers do this function. Likely not cheap.
 
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The length of the balance spring (among other factors) determines the rate of the watch. Shorten the balance spring, and it runs faster. It would mean installing a new one and getting it "vibrated"; specialized watchmakers do this function. Likely not cheap.

Maybe but there are other factors that could explain this fast rate. And it would be an easy fix - putting weight washers on some of the balance screws. It could correct the balance poise as well.
 
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Maybe but there are other factors that could explain this fast rate. And it would be an easy fix - putting weight washers on some of the balance screws. It could correct the balance poise as well.
You are indeed correct. Depends on the screws and what washers the watchmaker can get.
 
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That would be an easy task - if there is nothing else off! I am only an amateur and do this king of dynamic poising plus correcting of the regulator position thanks to washers very often - on very old vintages or watches with issues.