The Russian Ultra High-Security Lock

Used on Russian submarines, in embassies, and other very high-security applications, this lock was designed to be mounted on a locally-purchased safe, covering the keyhole. It was not designed to defend against forced entry-- the intelligence protected by the lock was only useful if no evidence of entry was left behind. It is designed for dual control-- both a key must be inserted and a combination dialled for the lock to open.  

This lock, owned by safe technician Paul Crouwel, is one of four in the world known to exist. More information can be found here:  http://www.toool.nl/blackbag/?p=31
        • This Cold War-era Russian lock is one of four known to exist. It was used only for the highest-security applications in the Russian government.

                      Opening procedure: