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The Encyclopedia of Horology

Tokyo, Japan · 1920 – 2015

Tsuneya Nakamura

Verified

Quartz wristwatch development

Life & work

Tsuneya Nakamura led the engineering team that developed the first commercially produced quartz wristwatch, released at the end of 1969.

The achievement required advances in crystal manufacture, integrated circuits, low-power stepping motors and battery technology at once, and it changed the industry permanently.

Training, contributions & innovations

  • Led development of the first commercial quartz wristwatch
  • Drove the miniaturisation of quartz oscillators and stepping motors for wrist use

Inventions & patents

  • The relevant patents are held corporately; the development is documented in company and industry accounts.

Signatures & markings on surviving work

  • Not a signing maker; the work is identified through company documentation.

Collecting significance

Signatures on historic work were applied by retailers and by later hands as well as by makers, so attribution should rest on the movement's construction and on documented provenance rather than on the name alone. A specialist opinion is worth obtaining before any purchase made on the strength of a signature.

Related photographs

Black Seiko watch close-up
Black Seiko watch close-up — gcardinal from Norway, CC BY 2.0. Wikimedia Commons file page
Dial detail of a Seiko Speed-Timer Chronograph Automatic 6138-0040 ("Bullhead"), 1976
Dial detail of a Seiko Speed-Timer Chronograph Automatic 6138-0040 ("Bullhead"), 1976 — Dnalor 01, CC BY-SA 3.0. Wikimedia Commons file page
Seiko SKX781 Orange Monster diver watch (2026-02-13)
Seiko SKX781 Orange Monster diver watch (2026-02-13) — Olgierd Rudak, CC BY-SA 4.0. Wikimedia Commons file page

No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.

Sources & references

  1. Britten, F. J., Old Clocks and Watches and Their Makers
  2. Loomes, B., reference works on British and European clockmakers (edition-dependent)
  3. Museum catalogue entries for signed examples

Where sources disagree, the disagreement is stated rather than resolved silently.