Yale changeable safe deposit box lock.

[oldlock]

As there has recently been some discussion on the Yale changeable deposit box locks.

Here is my example, which is an original factory cut-a-way sample lock from the Yale bank lock factory.





Here some of the keys that would have been supplied are shown, they are from left to right :



1 - The managers key, which is required to change the combination of the lock.

2 - The custodian key, which is required to allow the renters key to function.

3 - The renters key which ultimately opens the lock.

Here is a poor image of the catalogue page describing these locks.