Kilfit Makro Kilar UV Haze 0x Filter for 4cm f/2.8 Macro Lens VERY RARE V18

This very rare Kilfit Makro Kilar UV haze 0x filter is for use with the Kilfit Makro-Kilar 4cm (40mm) f/2.8 macro lens. It has a couple of very tiny nicks on its glass, but nothing major.