Helmut Sinn stop clock mechanical timer 1970 Germany

This boxing clock or laboratory clock is a 20cm or 8 inch stopwatch. An early product by Helmut Sinn from the Sinn company (check their website) in Frankfurt, Germany. The movement was sourced by the famous Junghans watches and clock factory, also in Germany. It is made of grey tin with a wood grey painted base. Some rust on the top that gives it some age. It winds, runs, starts, stops and resets. Great conversation piece or use in games.