Hi, firstly I am new to this forum. I was researching a watch I own and came across your post from 2013. I am really hoping that you can perhaps help me with a query I have. I have an Omega bumper automatic watch. The dial is signed 'Omega Automatic Chronometer Officially Certified' and the movement is caliber 351. I have been trying to do some research into if the 351 movement is actually chronometer rated. All the other information I have so far come across indicates it's not a chronomerer, however your post eludes to that some 351s were chronometer rated. Is this the case? I can send you photos of the movement and dial if that helps. Many thanks in advance. This is my first comment on this forum, so please bear with me! Abs
The condition of the dial does not match with the rotten rest of the watch... Dial is a refinished one and hence the wrong chronometer labeling.
Ive added some more photos. Are you able to advise me if this watch is original or otherwise. Does the dial originally belong to this watch? I have since found on the Omega database that the case 2577 had a 351 bumper movement, which is consistent with this watch. I have found that some 351s were chronometer rated. But I'm not sure if the dial is original to the watch. You views/guidance is appreciated.
The dial may not have the "t" before and after "swiss made" as there's no tritium neither on the indexes nor on the hands; not enough expert to tell if the indexes and hands were used in 1950 which seems to be the movement year. Try also to check the case back #.
The T in "T Swiss Made T" stands for tritium, which would be a luminous compond that should be present on the index and/or the hands (which it is not). To me it looks like the dial is slightly too small for the case.
So I take it from what you say the dial is not original. On another note the dial is marked T Swiss Made T
Do you have a photo of the movement? From what I understand, Ranfft lists 343, 352, 354 (partially), and 355 (partially) as 28.1mm bumper chronometers. Perhaps the movement and dial were not initially together.
No, I don't, the seller was not a watch person and didn't remove it. I looked up comparable models online to determine it. There was one with the exact same dial as this one. They didn't show a pic of the movement either. I would have saved that for my files. They did list the movement as a 351. I took their word for it, there was no reason to question it.
So you are posting your watch as evidence of a chronometer-rated cal 351 but you haven't even seen the movement.
Here is the listing for Ref. 2577; https://www.omegawatches.com/en-us/watch-omega-seamaster-omega-ck-2577 My guess is that your watch has a cal. 354 movement with chronometer adjustment language on the rotor. The major difference between the cal. 351 and cal. 354 is the addition of a swan’s neck regulator. I have never seen a cal. 351 with a chronometer certificate, although it is plausible that they could exist. The only way to know for sure is to bring your watch to a watchmaker and bring your camera. gatorcpa