Quartz clock
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Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. The crystal oscillator, controlled by the resonant mechanical vibrations o
A basic analog quartz clock
Modern quartz wristwatch
Circuit board of an e block from a chronograph-wristwatch. The quartz crystal oscillator can be seen on right.
Disassembled analog quartz clockwork; quartz crystal oscillator (top left), Lavet-type stepping motor (left) with a black rotor sprocket and connected white and transparent gears (right). These gears control the movement of the second, minute and hour hands.
Seiko
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Seiko Group Corporation, commonly known as Seiko, is a Japanese maker of watches, clocks, electronic devices, and semiconductors. Founded in 1881 by Kintarō Hattori in Tokyo, Seiko introduced the worl
Quartz clock
…revealed in 1967: the Beta 1 revealed by the Centre Electronique Horloger (CEH) in Neuchâtel Switzerland, and the prototype of the Astron revealed by Seiko in Japan (Seiko had been working on quartz clocks since 1958). The first Swiss quartz watch – the Ebauches SA Beta 21 – arrived at the 1970 Basel Fair…
The current Seiko House Ginza (Ginza Wako) building was completed in 1932 as the headquarters of K. Hattori (known in Japan as Hattori Tokeiten, now Seiko).
Portrait of Kintarō Hattori, 1916
Seiko Group in 1933
Kinetic SMY151P1