1939 Omega-help needed identifying.

Hi all!
I purchased yesterday what appeared to be a military style 1939 Omega 30T2.

Did they make military watches that were not engraved or could it be polished out? This one has a plain cade back.

I believe the reference for the air force issue ones was CK2292. Mine however is just a massive long number.

I can't find any standard civilian issues ones of these though, hence my confusion.

Any help really appreciated.

Cheers
HH

Should be an HS issued one. Engraving polished out . Often done, because officially" lost "...... Looks good .

Okay, thanks, I did wonder if polishing out of military markings was a done thing if kept by the person.