The Vintage Wrist Watch Company has dated this piece to the 1900s.
The watch has a stem-winding movement which is working nicely.
This inner cover has an inward indentation.

The watch measures 50mm diameter excluding the winding stem and the loop. The case is known as niello… niello is a black mixture, usually of sulphur, copper, silver, and lead, used as an inlay on engraved or etched metal, especially silver, in this case 800 silver. It is added as a powder or paste, then fired until it melts or at least softens, and flows or is pushed into the engraved lines in the metal.

The Edwardian style pattern with rose gold detailing on this particular watch is very unusual and one we have not come across before. Originally there would have been a rose gold wash around the edge of the front and back but most of this has worn off over the years, and there is some niello loss in places but still a very handsome piece.
The acrylic lens is in good condition.
The dial is in its original finish and the outer red 24 hours numbers are a nice feature.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1900s.
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