Chubb Safe Deposit
Chubb made
many designs and variations of safe deposit locks. This example
probably dates from the 1920's / 1930 and is controlled by a
bank guardian key, renters key and 3 A - Z combination dials.
The A - Z dial is detachable and would have been provided to
the renter for opening at the time of rental, the renter setting
up their own combination of letters.