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 signed Omega and the serial number 4,337,782 dates it back to around 1914.
The watch measures 52mm diameter excluding the winding stem and the loop.
Although this was an early attempt to produce a waterproof case, it should be kept away from water and moisture. The inside of the case back is signed with the Omega logo.

The acrylic lens is in lovely condition.
The signed dial is in super condition and the red inner 24 hour dial is a more unusual feature which is usually seen on military watches. The hour hand is a replacement but still a period hand.
The watch comes 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