The Vintage Wrist Watch Company has dated this piece to the 1940s.
The watch has a hand-winding movement, Omega calibre 30T2 SC. The movement is signed, just as it should be, and the serial number 9,915,438 dates it back to 1943.
The watch is a good size at 33mm diameter excluding the winding crown and the lugs. The case is known as an economy case, a combination often manufactured during and after the War.
The case back on this particular watch is a later replacement, originally it would have had a 6B marking for the Air Ministry, together with the military arrow. However, after WW2, many military watches were converted into watches for civilian use and this could have been when the back was replaced.

The lens is in good condition.
The signed dial has some marking towards the edge, between 4 and 5. The blued steel hands are probably the originals, the design is certainly correct. The red centre seconds hand is a replacement, again possibly part of the de-commissioning process.
A new black leather strap has been fitted.
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The Vintage Wrist Watch Company has dated this piece to the 1940s.
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