This antique brass Zeiss Kodak Anastigmat No. 5 8" (204mm) f/6.3 barrel lens appears to be missing part of its mount. As it is there is no thread to mount it to anything. Please see photos. There are a couple of scuffs and some discoloration on its exterior. Its aperture adjustment is smooth and its glass is free of any fungus, haze, or separation to its elements.