Quartz at 32,768 Hz — a power of two on the wrist

Every quartz watch cuts a tuning fork to hum at exactly 2^15 = 32,768 Hz, sealed, and 32768 / 2^15 = 1: run the signal through fifteen binary flip-flops, each halving the frequency, and the last ticks once per second (https://narrowhighway.com/s/6bf3076106b5fad0b32b8d799456d0acf9a402fd07d9dc1c7bb4b5bbfda02345 ). It is the highest power of two that stays low-power and stable — the oscillator meeting the divider chain. The crystal's resonance is an empirical property of the piezoelectric cut (Curie brothers, 1880); the CHOICE of 32,768 is pure digital logic. Time, on the wrist, is counted in powers of two.