Thanks in advance for the help. I own this watch, inherited from my grandfather 10 years ago. His name is engraved on the case back (Robert W. Rogers). This was a one-owner watch, with no known service record but my grandfather did not have much money to support upgrades or modifications. This was a prized possession. Believe this to be an Omega 2384-8 30T2 SC PC in 30mm from the 40's, but am looking for verification. My grandfather served in WWII as an Army Air Corps Navigator, but this does not have any iteration of the U.S.ARMY stamping, as shown. No signed crown. Possible this was a private acquisition during the era and just coincides with issued pieces? I cannot easily open the case as there is no typical lip/gap to pry off the case back, and I don't want to scratch it up further. Took it to the local jeweler and he wouldn't touch it as removal is not obvious. I'll take it to a watchmaker in the city, but looking for your expert interpretations here in the mean time. Any concerns with radium from this period? Thanks for all your input.