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Home » The Gruen Model Database » The caliber database » Caliber 615 (7.75L, Round, Extra Precision, 16J)
Re: Caliber 615 [message #14472 is a reply to message #14467] Thu, 04 February 2021 20:06 Go to previous messageGo to previous message
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Messages: 1178
Registered: May 2019
Location: Cincinnati
Gruen Authority
Tangled is right, Gary—but it’s my mind, piecing it together after 100 years. The chain sometimes involves a few steps, though, and all of these are variants of an FHF ebauche.

Aegler was finishing similar calibers in different sizes (see the Rolex cal 59). The second link above (small Rolex) is basically a stock Glycine 80. Too bad we can’t see the setting bits!

Look at dial side of Dr. Ranfft’s Glycine 80: you’ll see this 615 has different milling for the bits--Glycine won't fit.

I was just shocked to see this unique bridge layout show up in Vertex. TBD.

 
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