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The Encyclopedia of Horology

Quartz wristwatch · Japan

Seiko Quartz Astron 35SQ

Verified

The first quartz wristwatch sold to the public, introduced in Tokyo in December 1969.

Technical facts

Oscillator
Quartz crystal (8,192 Hz)
Case
18k gold

Historical significance

  • The first quartz wristwatch sold to the public, introduced in Tokyo in December 1969.

Diagram

bezelcrystalback and cuvetteband, bow and pendant
Schematic: case construction. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

Sources & references

  1. Seiko Museum Ginza publications
  2. IEEE Milestone: Electronic Quartz Wristwatch, 1969

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