Nippon Kogaku 5cm f2 hood (for rangefinder)

Description

This is an original Nippon Kogaku lens hood for the Nikon S mount rangefinder 5cm f2 Nikkor lens. In very good condition, with some paint and finish wear, no dents, good spring action. An earlier hood, though not the earliest: it’s marked “U.S. PAT. J. PAT. PEND.”