Ran across a strange one. I was working at a government site and was asked to duplicate some Best keys. The odd thing was, the key was longer than a normal Best key. The lock wasn't behind any armor but the blank entered the core further than a standard key would allow. Se the mark on the long key, that is where the face of the core was. Obviously my duplicates wouldn't enter this lock far enough to operate.
Any thoughts; is this a simple but effective anti-duplication feature?
