Mike,
Did you get any further with this cap?
There was a very interesting thread started here
http://www.britishbadgeforum.com/for...ad.php?t=65126
but it seems that nothing was forth comming... I have quite a few RN caps from during and just after WW2 with makers stamps that I can add to the above thread, but it would appear that I am not allowed?
So, come on Steve can you get this thread going so we can all learn?
Cheers,
Andrew