Ruhla Chess Clock / Schachuhr
UMF Ruhla Chess Clock from the 1960s. The clock is based on a variation of the calibre 6 alarm clock movement. Chess was very popular in the GDR as it was throughout the East European nations under Soviet influence.
In 1993, the Ruhla Garde chess clock was the last non-digital clock to be used in a World Championship match between Garry Kasparov of Russia and Nigel Short of the UK.