Help identifying and finding Omega from 1934, cal. 20F

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Hello all members,
It is my first topic here 😀
Recently I bought this Omega and I try to find some information about it. I can not find exactly model with a case and dial like that. Movement works and when I checked time it shows around +15/day. Power reserve around 40h. Based on Omega numbers from 1934, the case is Staybrite and it has the 20F movement. (I plan to do a full movement service soon).
I see that some watches from 1930’ are in some old brochures but I can not find exactly this one.
Case size 22.5mm x 32mm

Maybe someone can help 😀

I have attached few pictures.

Thank you

Best regards from Switzerland

Michal