Hi Todd,  The guy who is making a full (?) listing of all Gem roller
organ cobs is our Kevin McElhone of Kettering in the UK.  He is not yet
on the MMD which is strange, really, as he now works in a computer store,
so would have no problem.

I have just printed out your questions about your roll titles etc. and
will post it to him on Monday for a comment.

Brian Chesters - Isle of Man
http://www.litter-boss.co.uk/antique