A longshot but I don't suppose you kept one of the brass Ayrshire badges as a keepsake? There are several versions. The most common (and thus faked) is identical to the a/a one whereas the reference books all show the other versions and not this one. What I would love to find out if there was an identical last issue brass one to the a/a or if the fakes are made using a copied a/a design.
http://www.britishbadgeforum.com/for...hp?t=55&page=2
This is the original thread:
Alan