The Vintage Wrist Watch Company has dated this piece to the 1910s.
The watch has a stem-winding movement with damascene finish and a star wheel regulator, also known as a Church regulator (named after D H Church, sometimes referred to as "?the most important technical contributor to the success of Waltham"). The movement is signed and it has the serial number 21,908,227 which dates it back to 1918. The movement is protected by an inner hinged cover, it has some scratching.

The watch measures 50mm diameter excluding the winding stem and the loop. The case is gold filled and was made by the Illinois Watch Case Company. The case is nicely detailed to both the front and the back, with initials added to the front. It is in good condition with just the odd minor mark.
The winding crown pushes in to open the front cover.
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The Vintage Wrist Watch Company has dated this piece to the 1910s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page