Vintage Gruen: The caliber database » Caliber V7 17'''

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Caliber V7 17''' - pocket watch [message #12702]

Thu, 25 June 2020 02:07

thesnark17
Messages: 655
Registered: January 2017

Gruen Master

Type : Pocket watch
Period/date : 1922-1930
Gender : Men's

Caliber : V7
Movement Maker : Precision factory (assumed)
Movement Serial: 601k-667k with interruptions

There are two basic types: early and late. They differ in that the early models have jewelled center wheels, while the late models have cap jewels on the escape wheels. The changeover was made during a large break in production between 616k (center wheel) and 642k (escape wheel cap).

The hairspring collet and balance staff also change at some point in production, probably the same point that the hairspring stud changes. Currently this is known to be between 607k and 609k. The early stud resembles that of the earlier production V4. Apologies for the lack of a picture. The later stud is triangular.

Early model
/vgforum/index.php?t=getfile&id=6425&private=0

/vgforum/index.php?t=getfile&id=6425&private=0

/vgforum/index.php?t=getfile&id=6424&private=0

/vgforum/index.php?t=getfile&id=6427&private=0

/vgforum/index.php?t=getfile&id=6426&private=0

Attachment: V7 early model 2.jpg
(Size: 1.25MB, Downloaded 2007 times)
Attachment: V7 early model 1.jpg
(Size: 1.39MB, Downloaded 2019 times)
Attachment: V7 late model 2.jpg
(Size: 1.21MB, Downloaded 1997 times)
Attachment: V7 late model 1.jpg
(Size: 1.22MB, Downloaded 1989 times)

[Updated on: Thu, 25 June 2020 04:10]

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[Message index]

		Caliber V7 17''' - pocket watch By: thesnark17 on Thu, 25 June 2020 02:07
		Re: Caliber V7 17''' - pocket watch By: Case on Thu, 25 June 2020 02:39
		Re: Caliber V7 17''' - pocket watch By: thesnark17 on Thu, 25 June 2020 02:46
		Re: Caliber V7 17''' - pocket watch By: Case on Thu, 25 June 2020 03:02
		Re: Caliber V7 17''' - pocket watch By: thesnark17 on Thu, 25 June 2020 03:04
		Re: Caliber V7 17''' - pocket watch By: thesnark17 on Thu, 25 June 2020 03:05
		Re: Caliber V7 17''' - pocket watch By: Case on Thu, 25 June 2020 12:19
		Re: Caliber V7 17''' - pocket watch By: thesnark17 on Fri, 26 June 2020 20:40
		Re: Caliber V7 17''' - pocket watch By: thesnark17 on Fri, 26 June 2020 20:45
		Re: Caliber V7 17''' - pocket watch By: thesnark17 on Sat, 27 June 2020 03:05
		Re: Caliber V7 17''' - pocket watch By: Case on Sat, 27 June 2020 04:00

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