Abstract: A cassette lock includes a transparent block arranged for viewing nomenclature of an associated cassette to be secured, wherein the transparent block includes a lock cylinder directed therethrough, the lock cylinder arranged in operative communication with an actuator rod mounting a cam at its lowermost end. The cam in simultaneous communication with diametrically opposed lock pins permits projection of the lock pins from the lock cylinder to capture a cassette member between the lock pins and a bottom wall of the transparent block.