The Vintage Wrist Watch Company has dated this piece to the 1930s.
The movement is stamped Sphinx, Swiss made. The watch also has its original Guarantee paper in the back.

The watch measures 51.4 mm diameter excluding the winding crown and the loop. The nickel case has light surface marks to the front. The back has some indentations and unevenness which are not showing up in the photos.

The watch lens is glass and is in nice condition with only the odd minor mark.
The dial is signed J.M.Mc Lean, Dumfries, Sphinx Lever with Swiss made at the bottom. The dial is in nice condition with only the odd minor mark.
The watch has its original blued steel hands.
The Vintage Wrist Watch Company has dated this piece to the 1930s.
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