For your consideration this really nice rare BLACK Steinheil Munchen Tele-Quinar 200mm f4 lens in Exakta mount. All the other listings for similar teles are all bare aluminum, zero black ones, so for now, this gal's rare. Serial number is in the two million level,  Focusing is smooth Glass is excellent in, out and on. Comes with the original front cap, and rear cap, Exakta find. The pics show the outside condition: No, I did not oil or buff or wax it; that's the original finish!  I'm convinced: A rara avis for your optical aviary. I am no expert so if I made a mistake Sorry. Thank you for looking and Happy Bidding.