I won't have time before the end of the weekend to do real testing.
I am sure that Garrett (quoting the Ph.D thesis) is right about the scales showing the actinic correction because there are small changes in the real distances between the marks on the scale - not much - but they are there. I think this would only work for when there is no rear lens in the fixed flange lens?
The casket is definitely designed to cover landscape meniscus, tele landscape meniscus, single lens portrait, double lens portrait!
There don't seem to be many around of this variety (but there are lots of varieties!). I think this one is from before the de Pulligny collaboration - but is essentially the same as the Darlot engraved version.
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