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Q.6 Electronic Chronographs

The first electronic chronographs are:

11975Introduction at the Basle Fair 1975 of the famous 'Heuer Chronosplit' (cal. 100) by Heuer-Leonidas of Bienne, Switzerland, with a LCD screen for normal time indication and a LED display below that for time measurement. The watch was equipped with a quartz crystal with a frequency of 32 kHz and an IC issued by Integrated Display Systems USA. It was the first entirely solid state digital wrist-chronograph ever made. Later Heuer-Leonidas marketed the 'Chronosplit LCD' (cal. 102) with two LC displays, the 'Chrono-split Manhattan GMT' (1977), 'Senator GMT' and the chronograph 'Carrera' with an analogue and a digital LC display, the chronograph 'LCD Kentucky' with one LC display and the high tech chronograph 'Ford' with two LC displays (cal. 103).
21975In June, Seiko markets the world's first digital LCD chronograph, calibers 0634A and 0634B. It was a further development of the 0624A.
31976Omega releases the Chronoquartz 1 'Albatros' (cal. 1611), a watch with a hybrid display: hands for the time indication and a LCD for the chronograph and one quartz crystal 32 kHz for both. The first watch in the world equipped with both hands and LCD.
41977ESA 934.711 digital LCD chronograph.
51978ESA 942.711 digital LCD chronograph.
61979ESA 900.231, analogue and digital chronograph.
71983Seiko premieres the first quartz chronograph with hands. Three models were delivered: cal. 7A28, 7A48 followed a year later by the 7A38.

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Copyright by Pieter Doensen

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