Dear All, thank you for the posts above. Which are most useful to me. I can confirm all the numbers in my previous post. This is a Kings Crown 1940 engraving on the right side of the Bren gun. I bought this blind from Chelmsford Militaria prior to them taking delivery. I was promised the best one of the eight they purchased. I had looked at a lot of dog awful Dovetails before I found this one. My excuse for buying this is because it's my 53rd birthday today! Photographs to follow in a few days.