Category: history Category: history 1656 — Huygens and the Pendulum 1675 — The Balance-Spring Race 1761 — Harrison and the Longitude Prize 1770 — Mudge and the Lever 1850s — The American System 1927 — The Quartz Clock 1969 — The Quartz Crisis 1983 — The Swatch Rescue A Timeline of Timekeeping