Are different styles of 2577 cases interchangeable?

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Hey folks,
before I go by trial and error, maybe someone here does have the knowledge already and is kind enough to share:

I’d like to transplant the innards (movement, dial, etc) of a 2577 Seamaster I have into another case of the same ref. Both are cal 354s.

One case is of the earlier variant without the beveled lugs, one the later with them. For comparison:


I spotted a difference in the shape of the movement holder plate, too. One is shaped like an S, one seems to be straight(er), not sure if that’s correct though:



(apologies for the bad lighting but I hope the difference is clear)

Question is: Were the cases interchangeable regardless of the shape of the lugs? I know there was a point in the serials of 2852s when they switched from one set of movement holder plates to another, so while I haven’t heard of it for the 2577s I couldn’t rule it out.

The dial of one of them is very precious to me, which is why I wanted to check here first before I fiddle around and damage it. At the same time I didn’t want to hand my watchmaker some work of which I’m not sure it can be done.

Any input is appreciated. 😀 I’ll post the result as soon as the job is done, of course. If I’m really unlucky that might be a bit, though, as one of the screws on the movement plate looks butchered. We’ll see.

Thanks a lot!
 
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They should interchange.

Comparing a -8, early lug to a -10, beveled lug they both use a stepped retainer. I think the one in your first photo may be bodged.

The dial aperture is the same, 27.8mm.

BTW, this is a in hand observation, I took a movement from a -10 and placed it in the -8. Yes, I have way too many spare parts.
Edited:
 
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Iin theory, yes. I have swapped 2627 cases where one was a disaster and other was... less of a disaster? 😁

The watchmaker has the final word, but it's worth asking about.
 
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The second point of fastening into the case, is a notch in the middle case, where that little pin in the mainplate should fit in. Have a look, if both are at the same place. By memory around 1-2 o'clock in the middle case.
 
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The second point of fastening into the case, is a notch in the middle case, where that little pin in the mainplate should fit in. Have a look, if both are at the same place. By memory around 1-2 o'clock in the middle case.

The pin and screwed retainer position is in the the same location across the 3xx series of movements.
 
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Gentleman, you are too kind. Thank you very much! 😀
 
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Thanks again gents, very happy with the result and the transplant went without a hitch:

 
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MtV MtV
Thanks again gents, very happy with the result and the transplant went without a hitch:

Wow! So awesome to see a golf-dial.
Haven’t seen them expect in the book “From Seamaster to Seamaster”. They must be fairly rare?
 
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Wow! So awesome to see a golf-dial.
Haven’t seen them expect in the book “From Seamaster to Seamaster”. They must be fairly rare?

You can find a handful of examples here if you search through the forum, but yeah, definitely a rather uncommon dial variant. My guess would be that there are fewer examples than of hobnails.
 
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You can find a handful of examples here if you search through the forum, but yeah, definitely a rather uncommon dial variant. My guess would be that there are fewer examples than of hobnails.
Should probably search the forum for other rare versions as well. I would agree with you there. Golf seems more rare.

Your dial seems to have aged well. It’s not an enamel dial on these is it?
 
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Should probably search the forum for other rare versions as well. I would agree with you there. Golf seems more rare.

Your dial seems to have aged well. It’s not an enamel dial on these is it?

Nope - and thank you 😀 It does show aging, but the last time I saw an attractive, original one for sale was >2 years ago so I didn't really hesitate this time.
 
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Nope - and thank you 😀 It does show aging, but the last time I saw an attractive, original one for sale was >2 years ago so I didn't really hesitate this time.
That if anything shows how rare these are.
Good call. Life is too short not to buy the watch once an opportunity presents itself.
 
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Thanks again gents, very happy with the result and the transplant went without a hitch:


Awesome result!!! Congrats, buddy!
 
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MtV MtV
Thanks again gents, very happy with the result and the transplant went without a hitch:


So many cool elements to this dial.

Congrats!
 
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I don't like these golf balls much because of the rounded Omega logo.
They make me think about service dials manufactured in the 70's.
 
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I don't like these golf balls much because of the rounded Omega logo.
They make me think about service dials manufactured in the 70's.

One of the oddities about this particular dial style, indeed. I’ll produce a post about this at some point in the not too distant future. 😀