Suwa Seikosha (Sieko Epson) Corporation

Where the first quartz wristwatch was developed. It is registered on the List of the Institute of Electrical and Electronics Engineers (IEEE) Milestones as a key advance in Electrical Engineering.


Latitude: 35.672979000000
Longitude: 139.404061000000

Timeline of Events Associated with Suwa Seikosha (Sieko Epson) Corporation

Date Event Manage

Sieko Quartz-Astron

1927 to 1928

Crystal Oscillator - Quartz Clock

This modern clock uses an electronic oscillator controlled by a quartz crystal to keep time. Because of the very percise fequency of the crystal oscillator, these clocks are at least an order of magnitude more accurate than mechanical clocks.