Yes, it is another "My Grandfather's Pocket Watch" thread. There is not much information about Cauny on the internet, but it seems like it was a common generic Swiss brand. I think this is from the early 1950's. I assume it is gold filled over steel as I don't see any hallmarks, but it is a seems heavy for its size of 1.5".
It seems hardly used and was probably sitting in a box for 50 years, hence the pristine condition. I wound it yesterday to see if it works and it is still happily ticking away and keeping good time. I would get it cleaned, but I never wear pocket watches. Here are some pictures!
Thanks for looking!