Nippon Kogaku Nikkor SC 50mm f1.4 LTM
A unique lens, a Nikkor 5cm/f1.4. Rare to find in LTM, they are mostly produced for their Nikkor-S camera with its specific mount.
The LTM version is even more special as it has a builtin (same as the f2 counterpart) close focus, which allows you to focus up to 45cm.
The glass on this example is in perfect condition. No haze, no cleaning marks or fungus.