Advice need:Omega rectangular 18k GF cal 302(no model number on case back)

Dannyhkg · Jan 13, 2026

Hi everyone,

I recently came across this Omega rectangular watch online and am considering purchasing it,
so I need your expert opinions to make a decision.

This piece comes with an 18k gold filled case and is powered by cal.302 movement. The case back only bears a basic Omega logo and the number 676589 (likely the case maker’s number), with no model number engraved - this has me a bit confused as it’s not common in my experience.

My questions: First, was it normal for Omega watches of relevant reference and era to have no model number on case back? Second, can you tell if all parts (case, dial, movement, strap and buckle) appear original from the pics?

Photos of dial, buckle, movement and case back are attached below. Any thoughts on its authenticity, reference or production era will be super helpful.
Thanks a lot for your valuable insights!

B Rgds
Danny

Dan S · Jan 13, 2026

Many Omega watches were cased in the country to which the movement/dial was delivered, and they often look like the OP watch, without an obvious reference number. It's hard to be sure about the dial from your photos, but I am seeing some things that make me skeptical.

Dannyhkg · Jan 13, 2026

Thank you for your quick reply!
I’m curious to know what specific details about the watch have made you skeptical? I’d really appreciate it if you could elaborate a bit more. Thanks!

gatorcpa · Jan 13, 2026

The dial has “Fab. Suisse” at the bottom which would indicate French origin, but the case has the mark of S&W, a U.S. watch case maker. Also, the engraving inside the case back doesn’t look like it should for a licensed case manufacturer in the U.S.

Tbe buckle looks correct for a 1960’s watch, the dial looks correct for a 1940’s watch and the case is of a 1950’s style. Last, radium on the dial and not on the hands? Makes no sense.

IMO, this is a frankenwatch, put together from several different Omega watches. It’s very nicely done, and I would consider it, but only if the price was very low.

Hope this helps,
gatorcpa

Dannyhkg · Jan 13, 2026

Thank you for your precise analysis. I’ve decided not to purchase this watch. There are indeed quite a few tricky aspects when buying vintage watches, so I really appreciate all the experienced members on this forum for sharing their insights. Thanks a lot.

Advice need:Omega rectangular 18k GF cal 302(no model number on case back)

Dannyhkg

Dan S

Dannyhkg

gatorcpa

Dannyhkg

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