This door uses a locking mechanism patented by Swiss bank locksmith Bauer AG in 1919. We found 4 different variations of this lock in the vault. The mechanism prevents removal of the lock even when the door was open unless you had a special 'Director Key' which operated a secret bolt inside the lock. Very secure!

Another view of the secret bolt, two client keys and numbered lock cover.

On some of the earliest doors we found in the vault, each mechanical part was numbered by hand. For instance on door 374, we found the number 3-7-4 hand-stamped on the door, hinges, secret bolt, etc..., as many as 11 markings per door. These extra markings are found only on some doors and we put a special mention in our price list for these exceptional doors.

Specifications (lock only) Lock Type: Triple lock:  - 8-lever client lock*  - 5-lever bank lock*  - 4-lever director lock*  - 22 moving parts Brass, steel and iron. * Bolts counted as a lever Size & Weight (Small lock) Weight: 585 gr 1.29 lbs      Length: 134 mm 5.27 inches Width: 46 mm 1.81 inches Height: 24 mm 0.94 inches Size & Weight (Large lock)  Weight: 870 gr 1.29 lbs      Length: 132 mm 5.19 inches Width: 72 mm 2.83 inches Height: 24 mm 0.94 inches Door material: 1 cm thick steel (0.40'') Door Color: Brass and RAL 1013 Maker: Bauer AG (Switzerland) Patent: CH 91497 (1919) Build date: 1922