I didn't figure how to create a new thread so just gonna revive this old one since it's relevant! I was just gifted this watch from my late grandpa, a Zenith he was given by his company in 1973, after 20 years there (company name is ARBED on the case back). I'd really like to learn more about the watch if you guys have any knowledge! The case back seems to have some sort of part or serial number: 208105. There is no swiss made mention on the front. That's about everything i could notice.
I am too afraid to open the case back and look at the caliber at this point, I wouldn't want to damage it.
Do you guys have any idea what model this is, what caliber, etc ? I'd love to know more about this watch, it is very sentimental to me...
Also is it gold or PVD? No idea how to tell.
Thank you for your help!