Vintage 342 Bumper, 3-9-12 - model, thoughts?

Greetings - watch novice here seeking wisdom regarding an Omega watch in my collection. Last year, I got the vintage watch bug which I admittedly know very little about. Rather than buy an expensive pie pan Constellation chronometer before I was sure if I would like the old school 34 mm size and relative lack of water resistance in vintage watches, I decided to test the waters with a modestly priced 342 bumper with a 3-9-12 dial with the seconds sub-dial at the 6 o'clock. For what appears to be a 70+/- year old watch in fair condition, it keeps time and has old school charm. I don't know what model the watch is, or if it is even a frankenwatch? Could anyone point me in the right direction to ascertaining the model number or any thoughts in general? What I can glean: the bumper works beautifully, it is marked as 14k gold filled on the case at 6 o'clock and the dial appears to have some sort of residue or sun damage perhaps. Also, the seconds hand possibly looks unoriginal as it appears too long, and the hour markers at 5 and 7 o'clock seem to impede upon the sub-dial. Thank you.

Anyone have any insight about this watch - model number, year of manufacture, possible redial, anything at all?

Any pictures of the inside of the caseback?

Unfortunately not. The movement pictures are the ones the previous owner provided me, I never opened it - I don't have the tools.

Others will chime in but it is from the early 50s. The caseback will hold the information you need.

Hands don't seem to be original. About 1 mm too long and small hand not correct

Non Omega crown

Movement not bad

DON

I am going to get a caseback opener kit, take a look, do some research and hopefully have an update to post soon then. Thanks.

Also to echo what @gatorcpa said, this looks like it has a friction fit caseback and they aren't always easy to get back on without a case press. Save yourself the headache.

F6212 the caseback says - 1952 apparently. https://www.omegawatches.com/en-us/watch-omega-us-collection-omega-f-6212