Vintage Gruen: The caliber database » Precision Caliber 90 / 91 / 92 / 93 (Gruen Watch Co.)

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Precision Caliber 90 / 91 / 92 / 93 (Gruen Watch Co.) [message #11290]

Mon, 07 October 2019 17:13

Case
Messages: 1178
Registered: May 2019
Location: Cincinnati

Gruen Authority

Based on the many discussions around cals 91-92-93 recently, wanted to share this example. Stamped as cal 92, seemingly cataloged as cal 93. Interesting setting mechanism.

Introduction date: 1911

Identification method: "92" stamped both on back of dial & between bridges. I also say caliber 93, as this appears to be an orphaned radium dial version of Strap model 12 (note hands vs Strap 11 shown with radium dial), which Master Book lists as caliber 93
Size: 11'"
Thickness: 4mm
Jewel marks: 17 Seventeen
Adj marks: Adjusted Temp
Other marks: movement # stamped on front plate & bridge, "Suisse" stamped on back plate near barrel bridge, "15078" stamped on back of dial (dial serial #??)
Example production date: 1923-1924, based on movement #

Dial feet locations: 1130 & 530 positions
Dial attachment means: side screws

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Attachment: cal 92-93 back.jpeg
(Size: 823.28KB, Downloaded 1272 times)
Attachment: Cal 92-93 dial back marks.JPG
(Size: 113.71KB, Downloaded 1256 times)
Attachment: Cal 92-93 front plate.jpeg
(Size: 846.06KB, Downloaded 1293 times)
Attachment: Cal 92-93 front.jpeg
(Size: 293.55KB, Downloaded 1243 times)
Attachment: Cal 92-93 plate caliber 92 stamp.jpeg
(Size: 184.83KB, Downloaded 1259 times)

My two caveats:
1) I'm wrong many times a day --just ask my wife!
2) Always seeking to learn more

[Updated on: Fri, 24 September 2021 17:30]

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		Precision Caliber 90 / 91 / 92 / 93 (Gruen Watch Co.) By: Case on Mon, 07 October 2019 17:13
		Re: Precision Caliber 90 / 91/ 92 / 93 (Gruen Watch Co.) By: Case on Fri, 24 September 2021 17:29

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