So you put together that illustration yourself, very nicely done! And now I understand why the lensboard has an "earlier" color than the rest of the camera. Plus I thought that was an interesting looking lens, couldn't quite make out what it was. Camera West currently has one of these No. 1 Copal shutter mounted 75 mm Biogons for sale.
You may know Arne Cröll's piece on Carl Zeiss Oberkochen:
https://www.arnecroell.com/zeissoberkochen.pdf
He notes how with the original made-for-Linhof 75 mm Biogon the rear cell screwed in to a piece that was attached to the lens board rather than in to the rear thread of the No. 0 Compur, the thinking being that the weight of the rear cell might be a bit too much for the shutter to bear. Of course this made switching from the original Technika board to one of another pattern rather difficult.
Wonder if SK Grimes did the re-mount of yours and the one that Camera West has to the No. 1 Copal.
Just looked up the Biogon Camera West has, serial number 7 056 471, in Harmut Thiele's
Fabrikationsbuch Photooptik III Carl Zeiss Oberkochen. It shows this is one of a batch of 12 made in 1987 for Fairchild.
David
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