I've been playing around with an old brass barrel lens purchased recently from KEH. The lens is labeled "Plasmatic Extra Rapid Portrait, George Angell, Detroit, Michigan, 124." It also indicates the plate size covered (6.5 x 8.5) and has aperture markings of 4,8,16,32,64 (US system I presume). Although it is not indicated, the focal length of the lens is about 8 to 9 inches.

Any clues about the design of the lens or information about the manufacturer? Is "Plasmatic" a likely variant of Plasmat, making the lens a relative of the airspaced Dagor? Anyone out there from the motor city who has heard of this company? (Anyone else suprised at the ability of old lenses to make sharp contact prints!) Thanks for your help.

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