Vintage Gruen: 1950's and Up

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Groovy Led [message #19482]

Thu, 15 May 2025 19:18

Jenneke
Messages: 2077
Registered: May 2013
Location: Netherlands

Gruen Authority

LED watches were the very first digital watches. Interestingly the American watch manufacturers were in the lead in the digital watches market in the seventies. Not Gruen but Hamilton was the first to advertise a LED watch.

Model name: unknown
Type: LED
Period/date: 1972-1979 (suspect feb 1976 for this watch)
Gender: male

Case Maker: microsonic corp swiss
Case Material: base metal bezel, stainless steel back
Case Serial: -
Case Style no: -

Caliber: 9300?
Movement Maker: unknown
Movement Serial: -

Bracelet: stainless steel.

Other info: A LED watch is an electronic quartz watch with a digital display. Generally has 4 digits with 7 segments each. It is controlled by a tiny digital circuit with one ore more microchips. A 70s LED watch always needs two 1.5 V button cells, every 3 months. 😅 It has several leds in one segment. It is hard to get a good picture of the time… when pushing the button it only appears briefly.

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