This is a new old stock:
Vintage (~ 70's) Made in Japan lens adapter:
Nikon F to C-mount
(use your favorite Nikon F-mount lenses on c-mount cameras, such as Bolex H16 16mm movie camera shown in the pictures).
Excellent, like new condition.
High Quality.
Made in Japan
(camera and lens in the pictures are for demo only, they are not included).