Lens: originally used in gaz-fuelled "lanterne magique", +- 100 years old, petzval type, clean condition, same tiny marks on the rear element. I have used it on Nikon full frame - works very well as a portrait lens (soft focus - samples attached). Mounting is easy as rear crown thread diameter is 52mm (combined with Nikon BR2 and Nikon PN-11 extension it gives focus at about 3-4m and ideal portrait angle of view). Don't know how much covers on LF or MF but 6x6 is certainly possible. Focusing collar thread diameter about 56mm. Shutter: Thornton Pickard type, cloth needs to be replaced otherwise fine. Front plate removable (opening diameter +-56mm), designed for 1/15, 1/30, 1/45, 1/75, 1/90 and T. Selling them together: 150€ in Helsinki.