Posted By: 
Tim NewcombThese were issued around 1973-75.  When I was a teenager and just getting into older material, I bought a bunch of them (mostly Reds) because that was what I could afford.  They were very cheap and I loved the sharp colorized photos.  Obviously they are from the Burke-Brace archive of negatives.
I believe I bought them directly from Brace, probably through an SCD ad.  He had a ton of them and I wish I had bought more.  I don't remember them being called Bra-Mac at that time.
When I discovered ebay and returned to the hobby (1999) I was really surprised that so few of them were around.  (Naturally Fritsch would have tons at high prices.)  
I doubt there is a complete checklist out there anywhere, but I know the number issued ran to several hundred.  
Anything else you want to know, feel free to email me and I'll try to help--
Tim