One of the most elegant chess clock of all times has been made by a watch master William Tanner (born in Britain in 1880). Large and reliable clockworks from the German manufacturer HAU were built in into a wonderfully designed wooden case, which allows a view of the gear wheels of the movement. Produced until late 1920th, stamp on this clock states 1924. There is enormous evidence of the usage of these clocks on a top level (Menchik, Alekhine, etc), one of those is a game between Capablanca and Vidmar (London, 1922).