MacGnG wroteAny Ideas what this HUGE Yale lock was for?
Prison lock maybe?
(key is just for scale.)
Thanks!
It is a prison lock, probably a food door pass through. The keyway on your lock is A1L and it would have been supplied on a number 90 blank. The A1L was discontinued in prison locks and my info says it was only used in locks prior to 1893. HTH,
BBE.
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