Hey guys

Considering a buy of a Deville coaxial GMT (ref 4833.31.32) which I understand is based on the 2500. In reading up a bit, I found that the 2500A had some shortcomings which were addressed in the 2500B and later versions. The movement listed with the watch is a 2628.



Anyone know which version of the 2500 the 2628 is based on?

Thanks!

J

 

Okay - bear with me here....I will try to keep this simple, and I won't go over all the differences between these movements because there are a few (beat rate, design of the pallet bridge, etc., etc.). The one design difference I mention below is the really relevant one in my view.

The Cal. 2500 came in 4 versions, so A, B, C, and D. The first 3 versions (A, B, and C) all have potential problems related to being 2 level co-axial escapements. The D version is a 3 level co-axial escapement, so it does not have the potential for the specific problem that the other versions do.

Based on the serial number of the watch you are looking at, the watch has a 2628B. The 2628 comes in 3 versions, so the A, B, and D.

If you aren't confused enough, here is how the versions shake out:

2500A - not used for the 2628
2500B = 2628A
2500C = 2628B
2500D = 2628D

So with your watch having a 2628B, the movement is based on the 2500C with the GMT added.

My preference for any co-axial would be a 3-level design, so the D version of the 2500 or 2628, but of the other versions, the C is the next most reliable in my view.

Hope this helps.

Cheers, Al

 

Thank you sir. clear as its going to be I think.

Is the 2628B worth further consideration, or is it just not worth pursuing? if I understand correctly, the earlier versions have a tendency to catch on something and stop running.

The watch I'm looking at is a grey dial Deville GMT, ref is I think 48334131 but I can't find much info about it other than a lot of 'homage' versions (which look pretty convincing I must say! scary!). the omega web site lists the ref 4833.31.32 which is the same watch but with a white dial. the seller lists it as ref 168.1702 which I also can't find , but ofrei does list parts for it..

 

The movement may stop or may not. Omega offers a solution for it at service, and to date that solution has been working okay. If you search on 2-level co-axial escapement I'm pretty sure I have explained this issue in great detail previously.

Based on the serial number, the watch should be a 48334031. 1671702 is a partial case reference, and the seller likely opened the back and saw this number inside the case back, so they think it's the reference number.

Cheers, Al

 

Thank you Mr Archer!

 

Hi.
Soon I will be a proud owner of 212.30.41.20.03.001. May I ask what exact model of 2500 caliber this is?
(it seems like making new thread for it is unnecessary)

 

If this is the steel on steel deville gmt that sold on the bay yesterday for €1722, then you beat me by literally €2! Congrats. Nice watch!

I can't answer definitively, but if it has the 2628, then it's likely a 2500C with the gmt add-on. Maybe someone on here can look up the serial number and tell you definitively.

 

Hi.
No, my watch will be this one: http://www.omegawatches.com/collection/seamaster/diver-300-m/co-axial-41-mm/21230412003001
So no competion from me

 

Those only came with the 2500D.

 

Thank you.