| Gruen Electronic [message #6848] |
Thu, 12 May 2016 18:23  |
mikey
Messages: 709
Registered: May 2013
Location: Paris, Ontario
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Gruen Master |
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Model name : Gruen Electronic
Type :
Period/date : 1969-1970
Gender : Mens
Case Maker : Hong Kong
Case Material : SS
Case Serial : 150CA-357A
Case Style no :
Caliber : 9154 - 13 jewels
Movement Maker : ESA
Movement Serial: Y2 ?
Bracelet : Gruen black leather/suede (period?), 17mm lugs.
Other info : Interesting that the battery retainer clip is likely from another watch movement. It shows 11 jewels while the movement itself is marked 13 jewels. Watch is in beautiful condition and runs very well at 28,800 BPH/ This ESA movement (called the Dynotron) was launched in 1967. While it wasn't the first watch movement to employ transistors (that honour goes to the Accutron), it was the first movement to employ both a transistor and a balance assembly.
Still here....
[Updated on: Sat, 14 May 2016 15:38] Report message to a moderator |
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