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Gruen Electronic [message #6848]

Thu, 12 May 2016 18:23

mikey
Messages: 709
Registered: May 2013
Location: Paris, Ontario

Gruen Master

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.

index.php?t=getfile&id=2844&private=0

Attachment: Gruen 9154 Electronic dial.JPG
(Size: 129.07KB, Downloaded 1378 times)
Attachment: Gruen 9154 ESA Electronic case back.JPG
(Size: 132.02KB, Downloaded 1370 times)
Attachment: Gruen 9154 ESA Movement.JPG
(Size: 209.53KB, Downloaded 1376 times)
Attachment: Gruen 9154 ESA Electronic inside case back.JPG
(Size: 412.11KB, Downloaded 1372 times)

Still here....

[Updated on: Sat, 14 May 2016 15:38]

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Re: Gruen Electronic [message #6849 is a reply to message #6848]

Thu, 12 May 2016 18:35

MonKee
Messages: 177
Registered: May 2013
Location: Finger Lakes

Gruen Guildsman

Nice watch Mikey. These transition period electronic watches fascinate me. I have some including one with the same case, movement and hands as yours but a different dial. The most difficult thing about them is finding someone that will repair them. I know of no one in North America who works on them but there is a fellow in the UK that is excellent.

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Re: Gruen Electronic [message #6850 is a reply to message #6849]

Thu, 12 May 2016 18:37

mikey
Messages: 709
Registered: May 2013
Location: Paris, Ontario

Gruen Master

hi there and thank you! From what i have read these movements are fairly robust and have few problems. Mine seems to be running very well but given the lack of experienced repair persons, I think i'll take very good care of it...

Still here....

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