Longines 'Ultraquartz Cybernetic' Quartz Analogue Wristwatch, 1969-70.
- Made:
- 1969-1970 in Switzerland and Saint-Imier
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Ultraquartz "Cybernetic" quartz analogue wristwatch by Longines, Switzerland, c.1969. With seconds hand and date indicator. An example of the first quartz wristwatch of European origin. Case back marked '16' and '228794'.
An ultraquartz "Cybernetic" quartz analogue wristwatch by Longines, Switzerland, c. 1969, with seconds hand and date indicator. An example of the first quartz wristwatch of European origin. Case back marked '16' and '228794'.
The frequency of the quartz crystal is not divided down electronically but is used to control and correct the vibrations of an arm by means of a cybernetic circuit. The arm vibrates at 170 cycles per second and drives the hands through a pawl and ratchet mechanism. Discrete components are used instead of integrated circuits.
Details
- Category:
- Time Measurement
- Object Number:
- 1976-515
- Materials:
- leather and stainless steel
- Measurements:
-
overall: 125 mm x 40 mm, .06kg
overall (as displayed): 91 mm x 40 mm x 65 mm,
- type:
- wristwatch
- credit:
- Longines of St. Imier
