A bit of back story: The Gruen watch in question was handed down to me as a token of some personal and sentimental reasons. This took place around 15 or 16 years ago. In the beginning of my ownership of it I didn't really put much thought into what it was or the age or origins of the piece. Since then, every few years I would get online and try to find some information on it, specifically the age, but all without much result. Fast forward to today. I just came across the gruenwristwatches.com dating literature. I have been able to determine that the caliber I have (No.115) was only utilized during one production year, specifically in watch style number 275. When you plug this information into their style number decoder, it comes up with a year of 1937. Fantastic! But now I have some more questions...
1. The piece I have is marked 15 jewels but I have seen eBay listings of cal.115 movements with 17 jewels. Is it possible to have the same caliber with two jewel counts?
2. I don't entirely believe that this dial and the movement are original to one another. Can someone shed some light onto this theory as to whether I am correct or not.
3. This is obviously not the original case as the inside of the caseback is stamped "Duro watch case co." Does anyone have any interesting info on this case and/or company?
As a side note, not knowing the age of the case, the 10k RGP is holding up fantastically well. In addition, the entire watch is showing very well. From the dial to the movement, etc. It has very clearly been well cared for prior to my ownership.
I hope there are a few people that have more knowledge than I do on these watches and can help me in my journey to uncover it's story.