Not a clue what camera this was made for, but clearly quality glass coated elements. There is a slot where an iris was to be inserted and a list of focusing feet on the barrel. There is a threaded end that probably was used for focusing. The assembly does not adjust. Barrel is 27mm long. Front diameter is 32mm and the rear 10mm end of the barrel is 9mm diameter. Multi-element camera lens assembly. Focal length from the center of the barrel is 35mm. Also makes a great sharp compact quality color corrected magnifier.