Rams Head Antiques has dated this piece to the 1940s.
The watch comes with a copy of the service document.

The dial is the original and has centre seconds with Arabic numerals and an outer minute track. The watch was fitted with a brand-new glass when it was serviced. The case is predominantly steel but the bezel is 18ct white gold. The case has been professionally polished. The movement runs beautifully and the watch keeps excellent time, as one would expect from a watch produced by this renowned manufacturer. It is ready for years of service to its new owner.
Rams Head Antiques has dated this piece to the 1940s.
You can view the stock and full dealer information on the Rams Head Antiques Profile Page