Watchman's Tell tale Clock by Isgus

Metal. Case size approx 4.5" diam x 2.8" high. Dial 1.8" diam.

High quality 8 day clockwork movement with 13 jewels, Incabloc shock protection, lever escapement. Made by Isgus, Germany. A special numbered key is kept at each point on a watchmans round . This is inserted and turned to print the key number and the time. There is a mechanism to detect fraudulent interference