The Vintage Wrist Watch Company has dated this piece to the 1910s.
The watch has a stem-winding movement which is working nicely. The movement is fully signed and the serial number 1,491,095 dates it back to 1913.
This inner cover has some unevenness and a few scratches.

The watch measures 49mm diameter excluding the winding stem and the loop. The case is stamped inside the hinged case back with the Zenith logo, and it is also stamped Metal Blanc Garanti (although called white metal, it is nickel). The front of the case is in good condition. The case back has some unevenness.

The acrylic lens has light marks.
The double sunk dial has blued steel hands, a subsidiary seconds dial and an outer minute track. There are three hairlines but they are very faint.
The watch comes with a single chain, 30cm long including the T-bar and clasp, and also a locket attachment.
The watch and chain come in a new presentation box.
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