MPN11,
So we were told ! Mine (which,
AFAIK, have never beem polished) has dulled over the 73 years to the exact shade of a genuine silver coin of that age, but not tarnished). They are in the form of a brooch, so as to be easily transferred from one uniform to another.
Google no help.
We have a regular contributor here (is it Tankertrashnav ?), who was, at one time a dealer in medals and militaria. If he (whoever he is) is in earshot, perhaps he could help us. Or how about a USAF Pilot ? There must be some tuned-in here. An old retired one (my age or thereabouts) would be best of all.
Seems they are still minted: used one on E-bay at £25 odd IIRC.
Danny.