Leica NOOKY. This is an optical, near-focusing device for Elmar 5cm (50mm) lenses that fits between camera and lensIt is made to fit M39 Screw mount cameras.
The finish appears to be nickel with the optical portion in black lacquer. In 1939 a reproduction ratio scale from 1:6 to 1:17.5 was engraved on the focusing mount.This one has the repro ratio scale going from 1:6.5 to 1:17.5.
Ships gvia USPS Ground Advantage.