Vintage Gruen: The caliber database » Caliber 151 - (Extra) Precision

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Caliber 151 - (Extra) Precision - 5 1/2 '" [message #12582]

Mon, 15 June 2020 13:44

Case
Messages: 1178
Registered: May 2019
Location: Cincinnati

Gruen Authority

Adding this one into the database. The 1939 standardized parts catalogue lists this as "Extra Precision" grade. Not sure what that means. Was it one of the calibers that got a gold special "Extra Precision" edition for the 50th anniversary?

It is a Gruen Watch Co. caliber--not a Guild caliber--but there is no "Precision" factory serial number. Interesting. It seems to be Favre sourced, like so many 1xx series. Not sure what additional finishing, if any, Gruen did. Perhaps just grinding a bevel on the narrow ends of the front plate?

This one adjusted for temperatures only, I'm guessing mid- to late 1920s. Coded L 19.

/vgforum/index.php?t=getfile&id=6370&private=0

/vgforum/index.php?t=getfile&id=6370&private=0

/vgforum/index.php?t=getfile&id=6371&private=0

/vgforum/index.php?t=getfile&id=6372&private=0

Here is the Favre in-house version, sold under their Delphia brand. L 335. Thanks to seller for permission to post images.
/vgforum/index.php?t=getfile&id=6367&private=0

/vgforum/index.php?t=getfile&id=6367&private=0

/vgforum/index.php?t=getfile&id=6368&private=0

Attachment: favre delphia 151 bp.jpg
(Size: 205.63KB, Downloaded 2203 times)
Attachment: favre delphia 151 fp.jpg
(Size: 169.41KB, Downloaded 2203 times)
Attachment: 151 bp.jpeg
(Size: 158.79KB, Downloaded 2216 times)
Attachment: 151 fp.jpeg
(Size: 165.27KB, Downloaded 2198 times)
Attachment: 151 letter code.jpeg
(Size: 140.70KB, Downloaded 2220 times)

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

[Updated on: Mon, 13 July 2020 12:56]

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[Message index]

		Caliber 151 - (Extra) Precision - 5 1/2 '" By: Case on Mon, 15 June 2020 13:44
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Barney Green on Mon, 15 June 2020 13:57
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: afire on Wed, 17 June 2020 18:38
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Case on Thu, 18 June 2020 00:20
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Barney Green on Thu, 02 July 2020 19:31
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Case on Fri, 03 July 2020 03:24
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Gary on Fri, 03 July 2020 04:32
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Barney Green on Fri, 03 July 2020 05:51
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Case on Fri, 03 July 2020 12:38
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Case on Sun, 26 July 2020 23:48
		Re: Caliber 151 - (Extra) Precision - 5 1/2 '" By: Jenneke on Mon, 27 July 2020 14:23

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