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Home » The Gruen Model Database » The caliber database » Caliber 641 (640) - Factory R Gruen Guild (10.5 ligne, 15 jewels)
Re: Caliber 641 (640) - Factory R Gruen Guild [message #13390 is a reply to message #12090] Sun, 23 August 2020 03:48 Go to previous messageGo to previous message
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Registered: May 2019
Location: Cincinnati
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Here’s a curiosity. A 640/641 (stamped “640” as others) with different setting bits. Suggestive of a Felsa ebauche?

Anyway, finishing seems rougher, and the sn is 837. I thought it may be an an early run, pre-Factory R stamp.

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