I have an unusual brass lens that I have been trying to identify. It comes in a brass recessed unit to fit the lens deep into the camera. The rear of the lens is almost identical to a Harrison globe lens that I had. There is only the curved glass in the rear there is no lens element in front of the diaphragm. It’s pretty unique looking on the lensboard but I have never seen a camera with this type of recessed lens. Has anyone ever seen something like this? I am including pictures below.
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