Biezmez
108
Slightly disapponting
Unfortunately you initial reaction that this is not a 343 calibre is correct. It is a 342. That explains the situation. It was sold as a 343, but I am still pleased as I got it for reasonable price. Is now at the watchmakers for a full overhaul. Thanks for the feedback and comments. 
Omega seamaster automatic calibre 343
Hi This'll be my first post here so hope some of you well seasoned omega collectors are able to help. I have recently purchased this Omeage seamaster calibre 343 although I have some concerns about the dial only saying Omega Seamaster automatic, missing t...
Are you sure of the Calibre?
There were several iterations of the 34x and 35x (34X being sub seconds, and 35x being center seconds), most of which were not chronometers. I am guessing because of the generic crown the watch did not come with paperwork from a recent Omega service. How ...
Welcome here!
The caliber 343 (if I am not misinformed) existed both as Chronometre and non-chronometre. As for the crown, yes it is replaced. Please post some better photos of your dial and inside of the case back + movement. Maybe we can find some more info on your w...
Thanks for the info so far.
Many thanks to both the responses so far. Will post some more pictures tomorrow. Interesting that the advertisement you have is from Sweden as I am based in Norway so not very far away.
Slightly disapponting
Unfortunately you initial reaction that this is not a 343 calibre is correct. It is a 342. That explains the situation. It was sold as a 343, but I am still pleased as I got it for reasonable price. Is now at the watchmakers for a full overhaul. Thanks fo...
The 343 and 342 are from the same family....
Based on 28.1 mm bumper with sub-second. Best Blomman
A cal 343 chronometer would normally command a stiff premium . . .
. . . so as long as you're satisfied with the price paid, then all's well. The ubiquitous 'clover leaf' pattern crown would be the correct replacement choice; they're still available from the usual parts suppliers. Congratulations, and welcome to our Omeg...
Thanks again
Would certainly agree about the black dial. Thanks again for the feedback. Will post some new pictures of the 342 once its proper crown in place.
To finish off this post
Here is the watch after a trip to the repairers. Running really well and with a proper crown in place. ...
Ah, that's even better! A correct crown . . .
. . . adds much to the appeal. A few of mine, including the Tiffany chronometer, have replacements that don't reflect the originally issued designs. Art ...