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Picked this dial and 352rg movement up from EBay....

smorrisonmd
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hoping it would fit in a 2577 case, but it will not. Appears to me to need a "jumbo", probably a 2517 ( I have started an eBay search for one), but are there others that would be appropriate? Other ideas on sourcing
s-l1600-6.jpg s-l1600-5.jpg
? Attn: Don and Bill Sohne. Either of you hoarding one?😀
 
gatorcpa
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Is it the movement that is not fitting or the dial?
gatorcpa
 
MtV
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gatorcpa gatorcpa
Is it the movement that is not fitting or the dial?
gatorcpa

The movement should fit really, cal 352 2577s are a thing.

The 2517s are also 34mm though, are they not?

I’m yet to see a cal. 352 2577 without Seamaster on the dial, so far I’m only aware of cal. 351 examples in that configuration.

Other center second jumbo bumper Seamasters would be 2765, 2771 (not sure, those might only exist in tripple-stamped cases with 2765/2764), 2494 and 2521 I believe. Can’t comment on no-Seamaster-dials in those though.

Either way - it’s a cool find indeed.
 
sheepdoll
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2577 cases are hard to find. I have been looking for months.
There is a 2765 which may be closer to what my 351 movment wants but they want over 500USD. One can often find a complete watch for that. Although such a watch would defeat the purpose.

One thing to watch out for is the SC variation adds a few mm to the depth of the movement. As the OP noted there are also dial variations when one gets into the jumbo sizes. edit: calendar date wheels can also affect dial thickness.

What is useful is the crystal size chart which gets uploaded here from time to time. That thread probably should be a sticky.

Here it is again. I refer to these a lot when searching for empty cases.

Also be forewarned, there is a lot of competition when cases do show up. Other times cases have major issues. I regret that I did not get a 2577 with bunged lugs. Sat in my watch list for months. Then one day was gone.

Glas gamle numre 1.jpg Glas gamle numre 2.jpg Glas gamle numre 4.jpg Glas gamle numre 3.jpg
 
Glas gamle numre 5.jpg
smorrisonmd
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gatorcpa gatorcpa
Is it the movement that is not fitting or the dial?
gatorcpa
The dial. Which is why I am assuming it needs a "jumbo" case. As other have noted, the movement should fit in a 2577
 
smorrisonmd
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gatorcpa gatorcpa
Is it the movement that is not fitting or the dial?
gatorcpa
Hi Gator,
You have posted your own sweet 2517 chronometre. What is the case size?
 
gatorcpa
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smorrisonmd smorrisonmd
Hi Gator,
You have posted your own sweet 2517 chronometre. What is the case size?
35mm. But that’s not the measurement that matters. You want the dial diameter. That I do not have.

However, I think my 2517 dial is slightly larger than my 2577 dial.
gatorcpa
 
smorrisonmd
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Badda Bing. I think the 2517 case, and the dial, is ~ 1mm larger than the same for the 2577.
 
gatorcpa
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smorrisonmd smorrisonmd
Very nice. Please confirm it is a 2517, and give case diameter.
I think it’s a Ref. 2520 if it’s solid gold.

https://www.omegawatches.com/en-us/watch-omega-seamaster-omega-ot-2520

These had “Officially Certified” on the dial if made in 1951 or later.

If the case is not gold, then it’s likely to be a 2577. These models are often confused, since some gold casebacks have both references.

upload_2023-5-18_9-51-12.png

https://omegaforums.net/threads/fs-18k-omega-chronometre-2577-2520-c-352-1950.32978/

Ref. 2517 had lyre lugs similar to early Constellations.
gatorcpa
 
MSNWatch
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Looks like that came from a 2517. There is about a 2mm difference in the dial diameter between 2577 and 2517. 27 vs 29mm if I recall.
 
lennylee
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gatorcpa gatorcpa
I think it’s a Ref. 2520 if it’s solid gold.

https://www.omegawatches.com/en-us/watch-omega-seamaster-omega-ot-2520

These had “Officially Certified” on the dial if made in 1951 or later.

If the case is not gold, then it’s likely to be a 2577. These models are often confused, since some gold casebacks have both references.

upload_2023-5-18_9-51-12.png

https://omegaforums.net/threads/fs-18k-omega-chronometre-2577-2520-c-352-1950.32978/

Ref. 2517 had lyre lugs similar to early Constellations.
gatorcpa

yes its 2520
 
DON
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If you mean me. I sold all my cases over a decade ago, but never had for that caliber. Owned 3 of them (one of each caliber), but had no cases
 
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