Nikon AH-3 box camera The Nikon NC is a

The Nikon NC is a neutral filter (basically just protective glass) for 95mm filter threads

with only very light paint wear

The Leitz 16542 ELPRO 2 is a close-up attachment lens designed for use with Leica R series lenses with 55mm filter threads (though it should work on nearly anything with a 55mm thread

with surface marks and scratches: not the most perfect head you'll see

with limited compatibility

Nikon AH-3 box camera The Nikon NC is aNikon builds some of their cameras and motor drives with the tripod sockets way off centre, whoopsie! Fortunately, and by complete coincidence, they also make this handy device that can re center tripod sockets. If you have a Nikon N2000, and N2020, or a camera with an MD 4 11 12 14 or 15 motor drive, the AH 3 will screw right in and put that tripod mount back where it belongs. In excellent condition, with instructions.