The Vintage Wrist Watch Company has dated this piece to the 1930s.
The watch has a stem-winding movement, calibre 40.6L T2 15P, which is working nicely.
The movement is protected by an inner hinged cover.

The watch measures 47mm diameter excluding the winding stem and the loop. The case has the early Omega logo inside the hinged case back. There is some unevenness to the case back but other than that, the case is in good condition.

The lens is plastic. There is very minor marking but it is not too visible to the naked eye.
The white enamel dial is signed Omega. As well as the black numbers, there is an outer 24 hour dial in red. There is some damage at number 11 and some radiating hairline cracks.
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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