Help identifying a 33 mm vintage omega

Hello everyone,
So this watch used to belong to the uncle of my father who passed it to my father who then passed it to me so its been in the family for nearly half a decade i’d say (theyre both quite old)

From what ive been able to gather online i think it has a 30T2 SC calibre (i’ve cross checked from here) but im not sure as i havent had it opened (and i’d really love to be able to identify it without having to so so)

Here are the pictures ,it has my great uncles name engraved on the caseback and i didnt really want to take a picture of that, its a plain steel caseback as you might be able to imagine so i hope it wont be nuisance for you.

The leather strap also has a swiss made mark on it but its kinda diffucult to capture it on camera

Thank you so much in advance for your time and efforts

First of all Thank you so much for the help

They look really similar but all the vintage 33mms that ive seen atleast have 4 numbers on the dial ive never seen one like mine that only has 12 on the dial