Joseph, here is the thread i referred to above:
http://www.largeformatphotography.in...Early+euryscop
If you look at later posts, you'll see that about 5 C "euryscopes" had been identified on this forum. I recollect seeing a half dozen or so sales of these on eb@y in the past 5 or so years. So, not too common, but not too uncommon either. Definitely a nice lens.
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