It’s design looks a lot older but with wartime shortages anything is possible.
There are a lot of English aviation people on PPRUNE who are into history, register and ask there in the non-pilots forum, and perhaps in the military forum where they will understand why you posted there. Non-aviation people tend to get a little beat-up for posting in the Pilot’s forums, just a head’s up. But generally they are nice and helpful people there with a few exceptions.
Whatever it is, that’s old and appears genuine. And very cool! I love old lights.
Think I spend more time ogling old crusty lights on ebay than I do anything new. It’s just so dicey to bid, but I’ve scored a couple neat ones for pretty cheap.
Good luck with your research. Let us know what you find!