I just serviced this bumper 354 movement with a black waffle dial. The lume at the 12,3,6, and 9 positions seems to have degraded and there is a "shadow" at the 10 o'clock position. The movement has been hidden away in a tin for many years. The movement "works" but there are balance problems which I can fix with a balance complete replacement. The balance staff is too long. The hairspring coils are touching each other. The roller table slips. One pivot is bent. Which are reasons the movement was put into storage. I believe the original case was gold and was melted down. Could someone comment on the lume degredation. What is the correct case number for this movement? The movement serial number is 13,543,047 which I believe dates it to 1953. Is this a Seamaster?

 

2710 maybe?

 

It would fit in a 2627 case but that's not its proper reference.

 

Have you removed the bridge over the rotor and the reverser mechanism, or is it missing? Rather than looking for parts, you likely should be looking for a parts movement, hopefully with a case, so that you can make two movements into one.

 

Yes the bridge is removed. I have reinstalled it and the movement is complete so I don't need a "donor" movement.

. Thanks for noticing. The movement is working but not to my satisfaction because the balance has flaws, as I noted.

 

According to the Omega website, the 354 movement was used in the Tresor, Seamaster, Constellation and US Collections. The OT 2710 is a Tresor (as is an OT 2736) and the movement would fit. I don't think this is a Constellation dial, so I'm ruling those cases out. If the numerals were present at the 3,6,9,and 12 positions, I would be confident in putting it into a Seamaster case. I recall seeing black waffle dials in both yellow (gold) and white (stainless steel) cases but I believe that this was originally in a gold case which was melted down. I would be OK with a stainless case but would prefer gold. I am not going to make a Frankenwatch out of this. Seamaster cases are 2635, 2494, 2577, 2767, 2753,14350. Omega also lists the "US Collection" cases as G6213, G 6525, G2736. Perhaps a Ross G6267.