1966
Radio-Controlled Transistor Pendulum Clock
The clock was driven by a battery instead of a mainspring and gained improved accuracy from a pendulum with a transistor. The error caused by temperature fluctuation was corrected by mechanically resetting the hands, thanks to the official time transmitted by NHK via transistor radio waves.
| Name | Radio-Controlled Transistor Pendulum Clock |
|---|---|
| Time/Period | 1966 |
| Additional information | The clock was corrected based on a time signal transmitted by NHK radio for 90 seconds twice a day, at 7 a.m. and 7 p.m. Thanks to its high accuracy, the clock was widely used at watch & clock stores, schools, and homes. |
