This is a vintage Tanaka Kogaku 135mm F3.5 Tele-Tanar for Contax or Kiev Rangefinder. The lens is in good condition with perhaps a few internal micro specks of dust or something. Good mechanics and clean iris blade tips. Sold with a metal rear lens cap (which has some dings on it).
Non-Zeiss and non-FSU lenses for Contax mount are quite uncommon, so this beautiful lens is very collectible as well as usuable!
Price: $75 plus insured shipping