Quartz movement

A quartz movement is an electronic movement whose timekeeper is not a balance-and-hairspring mechanism but an electrically excited quartz crystal. Introduced in 1969 with the Seiko Astron 35SQ and the trigger of the "quartz crisis" that almost ended mechanical Swiss watchmaking in the 1970s, it is today a niche in premium watchmaking — but one that remains technically and culturally relevant in individual references.

How it works

A small battery powers an oscillator whose circuit excites a tiny quartz crystal — usually tuning-fork-cut — at its resonant frequency of 32,768 hertz. Electronic dividers step this down to a one-second pulse. The pulse drives a stepper motor that turns the hands through a small gear train.

The 32,768 Hz resonance is a power of two (2¹⁵), which makes digital frequency division especially efficient. The mechanical energy required to drive the hands is minimal — a button cell runs the watch for two to ten years depending on architecture.

Accuracy and tolerances

A standard quartz movement runs within ±15 seconds per month; a high-precision quartz movement like the Citizen Caliber 0100 or Bulova Precisionist runs far below that, down to ±5 seconds per year. COSC certifies quartz as well, under a separate, far stricter standard.

A standard quartz movement therefore outperforms any mechanical movement by a factor of 100 to 1,000 in rate accuracy. That margin was the economic lever of the 1969 to 1980 quartz crisis.

Quartz in premium watchmaking

Despite the mechanical renaissance from the 1980s onwards, quartz has held its ground in specific places:

• Cartier Tank. Many current Tank references are quartz — a deliberate choice for slim build and low maintenance in the jewellery-watch context. Cartier runs the Tank Quartz alongside mechanical variants.
• Cartier Santos. The small and medium sizes are also quartz; mechanical variants are reserved for the larger cases.
• Omega Constellation Quartz. High-precision quartz movements, partly COSC-certified.
• Grand Seiko 9F series. High-precision quartz with ±10 seconds per year and a mechanical hand-drive system that translates the quartz's tick into a smooth seconds motion.
• Breitling Aerospace, Superquartz. Pilot watches with high-precision quartz and multifunction.

Choosing quartz at the premium level today is not a cost decision — the movement is not cheaper than a comparable ETA — but a decision for accuracy, slimness and low maintenance.

What quartz is not

• Not a synonym for "cheap". High-precision quartz like the Citizen 0100 or Grand Seiko 9F can cost more than a standard automatic.
• Not maintenance-free. Batteries must be replaced every two to ten years, gaskets inspected. High-grade quartz movements need a stepper-mechanism service every 10 to 15 years.
• Not a guarantee of value stability. With the exception of select cult quartz references (Royal Oak Quartz 14790, vintage Cartier Santos), quartz watches generally hold less stable secondary-market prices than comparable mechanical models.

At our atelier in Munich we encounter quartz most often when advising on the Cartier Tank: collectors regularly choose between a modern Tank Quartz and a Tank Solo Automatic, and the decision turns on wearing profile, size and design expectations.