To my eyes, this is much more similar to the cal 283 Omega Century from the mid 50s...other than the fact that it's missing the word "Century" right below "Omega". I would recommend you head to Omega's site and look through their vintage watch pictures from the mid-50s. The search functionality isn't great so it's a little time consuming, but it's probably the best way to confirm what you're looking at.
https://www.omegawatches.com/planet-omega/heritage/vintage/
Other thoughts - the case has been polished (not extensively) and I'm guessing that's not the original crystal, but I love the patina. As
@RJwatches notes, this isn't every collectors "thing", but I personally love the age on these. At this price, you can wear it daily.
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