I recently picked up a rather curious piece of old lens. Have a look:
I suspect that this has been removed from an old folding camera with a bellows focussing assembly. It’s all brass, and the front and back lens elements can be unscrewed easily for cleaning. The iris is operable and moves pretty smoothly between f4.5 and f36. The swirly flourishes around the name plate suggest a late 19th / early 20th century Art-Nouveau aesthetic. Apart from these clues, there are no other names or serial numbers. So where did it come from?
I think that this has been unscrewed from a Dr. Krugener German folding camera; which would possibly date it to somewhere between 1898 and 1905. The sticking point is that my lens looks a little more rustic in design than the other Delta lenses I’ve seen from the same period, though the typography of the name is practically the same as some of the images I’ve seen.
I’ll clean it up and keep on looking !