This is Carl Zeiss Jena Flektogon 35mm f/2.8 lens converted to Arri PL mount, probably from genuine M42 screw mount. Lens has 'hard mount', not lens adapter and it focus to infinity. Optically in fine condition, no deep scratches, separations or fungus, but it has two marks on glasses (one under rear glass and one inside optical constuction, near glass edge - both can be seen on last picture) and some haze / haze marks on glasses coatings (not much, but under LED lamp you can see them). Because it is old lens, it can have like two/three cleaning marks, few marks/spots on coatings or some dust in inside optical construction. Mechanically lens works really good, focus ring is very smooth. Aperture ring works smooth and fine too. Aperture blades with no grease on them, clean, they close to the end. Visually as on pictures, really good condition, as for old lens, no damages on casing, just some normal signs of use. Price 199.99 USD or 'best offer' price. This is 'as is' auction, so no returns or exchanges, all sales are final. I'm also not an expert in lenses, so i've described them the best, i could. 

Thank you !