The Vintage Wrist Watch Company has dated this piece to the 1920s.
The movement is protected by an inner hinged cover which has a minor marking.

The chronograph measures 51mm diameter excluding the winding stem and the loop. The case is nickel and it is in nice condition with just general light marking, nothing serious at all.
The acrylic lens is in good condition, just light marking.

The signed dial has an inner 24 hour dial, two subsidiary dials (one for constant seconds and the other to record up to 30 minutes), and an outer 0-300 scale which is a classic feature on English navigation chronographs. There is a small old patch of damage at the bottom of the dial.
The chronograph comes in a period presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1920s.
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