From: Dennis Boone
Haven't managed to id the 11/05 key yet.
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).
Noel