This is an extremely rare Leica thread mount variant of the original Voigtlander 50mm f1.5 Nokton lens. In very nice cosmetic condition, with only very minor barrel marks. Focusing is smooth, and diaphragm works well. No optical hazing, but there are a few minor internal marks and slight delamination at one edge. Shockingly few of these lenses were made, and hey, here’s one now!