The clock’s quartz movement kept time accurately, and the pendulum added a nice touch of tradition. However, we noticed that the clock’s materials were not the most durable, and the pendulum ...

According to Pontiac Service Bulletin 78-I-74, issued in August 1978, a new air-core tachometer and quartz-movement clock assembly was incorporated into the model line as a running change in June ...

See, mechanical clocks rely on an oscillator—the watch’s inner movement, or a grandfather clock’s pendulum, say—to control the system’s frequency, which is how the clock maintains ...

A pendulum swing, say, or a 'Mississippi' just about equates to a second, the unit of timekeeping that as we know comprises minutes and hours. But even the best mechanical pendulums and quartz ...