[Omega bumper] Cal indentification

[pedrogps08]

Any idea what is this (and even if it's real or not). One friend got this but have no idea how to help him identify this as I've never had a bumper before.

Any ideas?

 

[sheepdoll]

Need to see the inside caseback. The rotor may be blocking the bridge with the caliber

Most likely a 330 or perhaps a 342. I just got a job lot of spares for these. SN puts it in the mid 1940s. Probably 1945 or 1946. Perhaps a bit earlier.

Dial has probably been redone. I am more used to the 1950s and 1960 dials, so the early one often fox me. Especially with the roman numerals and sector track.

 

[omegastar]

Probably :
Cal. 30.10 (later cal. 330)
Ref. 2374
From Portugal

 

[speedb]

check under the balance, agree that it is likely a 30mm bumper - send some proper photos of the dial