Magic Eye Police Lock

[BBE]

Thanks Billy, Mark and Phil. Fascinating, so was it a police initiative and whats the Magic Eye part refer to. I notice on mine it has a square spindle socket, so I assume that was the overide connection from the outside.

Thanks everybody for the enlightenment.

Both are just brand names those square tailpieces weren't made by all companies and sometimes hard to find by those who did make them.
BBE.