Development of Solar Chronograph Watch with 1/100 Second Measurement Function

Abstract

  We have developed a new solar chronograph watch, Cal.8A50. This watch is equipped with four independent dials and corresponding measuring hands, allowing stopwatch measurements in 1/100 second increments. When measuring with a stopwatch, each measuring hand moves at high speed to display the measured time. The GEAR BOX structure provides an independent dial layout and high-speed movement of multiple hands. The special drive system suppresses the drop in battery voltage during high-speed movement.