Does anyone know where I can find information on RR production models and dates they were made? I've stumbled on to a RR502 Tortoise Barlow which doesn't seem to be in production anymore, and I'm trying to find out more information on it i.e. when made. Same thing for an older (i'm guessing) RR201 rough jigged amber bone Barlow with no bolster stamp.
Don't know if this will help or not, but an acquaintance of mine has written extensively about RR. He doesn't have all their models listed, but his contact info is included on one of the pages, so you could possibly contact him; he knows more about RR than anyone else that I know. Good luck: http://blindkat.hegewisch.net/RRR/