I have an original (which was used to make a ton of
replicas for
people a while back); it says "Chicago Lock Co" and "GRB 2". No idea
what the latter means. The copies were made with Hillman Y11 and FR4
blanks (both work, but one has to be trimmed a bit, length-wise).
Aha.
Cut 215 on Ilco S1041T.
De