| Re: Gruen Verithin pentagonal pocketwatch [message #5738 is a reply to message #5736] |
Tue, 28 July 2015 15:46   |
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Thojil
Messages: 650
Registered: May 2013
Location: Concorès, France
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Gruen Master |
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I can only confirm what has been concluded already that the movement is definitely a V1. As Gary is saying the V1, V2 and V3 Extra Precision are the only Gruen movements that had a friction type staff. I'm surprised that the staffs you have are not fitting.
Two questions that come to mind; are the staffs you have tried original and secondly are the not for a V1.5 movement?
Some more info on this caliber taken from the 1916 Gruen Blue Book.
"Fine ruby jewels, raised solid gold settings, chronometer balance of stationary adjustment, patent gold train wheel system, isochronal brequet hairspring, double roller precision steel escapement, stop guard, poised fork, gold train, patent regulator, adjusted to all positions, temperatures and isochronism."
I have a doubt that the dial is original though. Dietrich Gruen signed dials were only used for the top of the line Ultra Thin (UT), Ultra Ultra Thin (UUT) movements and for the special Power Reserve and Minute Repeater movements.
One indicator can be if the dial feet are at their original position or have been moved. Then again, Gruen was not always consistent with regards to dials, so it could be original.
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