The listing, 1904 American Walthon Watch Co. has ended.
This 1904 Waltham Pocketwatch is missing it's front glass.
The Bezel is there, so it could be popped off to add the glass. Inside the case it says Keystone Watchcase, under wich is the gold symbol (?) over a pair of scales.
Then it reads Guarenteed ~J. Boss~20 years. Before 1925 this meant the case was gold plated or filled.
The Mechanism reads A W W C O Waltham Mass.
I believe the size is 16. Although this pocket watch is not running now, it's extremely clean with no dents or visible blemishes. Really pretty for it's age.