There is an inscription inside the case back that it was presented to a Chas. Clark in 1912 from a Delavan Smith and I'm pretty sure this Zenith movement is original to the case.It is about 16S, 17-jewel, nickel and adjusted to 3 positions and being pendent set. This is probably the most common question watch collectors have.Sometimes it is easy to answer, and sometimes it is impossible.Well, Zenith serial number 1204675 is shown in a cut in a 1909 ad.
I can probably try to post a couple of pics, if anyone is interested?
Some companies (as with the Gruen Watch Company), even lost rocords to fire or other natural disaster. I am sure they had no idea that their timepieces would someday be collected.
There are several ways to get an idea of when your watch was made.
Waltham watches were made between 18 in the city of Waltham near Massachusetts in the USA.
There are many collectors of these antique watches and as a general rule of thumb the rarer and older the watch is then the more value it will have. I always use something made from a stiff plastic rather than a metal knife recommended by many people.