Here is a rare Citizen piece from about 1992. It incorporates a shock sensor to start the chronograph. You slap the face of watch to start and stop the timing. This one ran the Boston Marathon with me twice. Citizen also made Ski and Bike variations. I keep feeding it batteries so it still loves me. Lol.
All the best. HEO.
This message has been edited by FabR on 2020-06-06 20:56:06 This message has been edited by FabR on 2020-06-06 20:56:26