I know Corbin referred to these as master ring locks (I have many of those as well :)), however I believe Sargent marketed theirs as the Duplex.
I believe the correct terminology would be "master ring" rather than "duplex".
I know this thread's a bit old, but I added a duplex to my collection recently. Figured I'd post my disassembled pic to give an all-inclusive view of the internals in case anyone's interested.
Looks like a clock key to me.
Hi - Hope someone can tell me what this key was made for. It measures 3&1/2 inches long. The Bow and Shaft are brass with the last inch being steel. The steel end consisting of the Hex Opening. The...
Stops at full left or full right with 18 clicks in between Pat Pend and C450 on back. Thanks for any help.
Please refer to this thread, very first post:
The Lock has full size Dial same size as lock, unnumbered, red dot in center. Pat Pend on back. C450 at bottom. Stops at left or right. 18 clicks in between stops. Thank you for any help.