A Japanese-made upright (non-reversed) universal viewfinder by Nippon Kogaku, MIOJ. Its design closely resembles the Leitz VIDOM finder. Finished in all chrome plating.
The eyepiece is engraved NIPPON KOGAKU TOKYO. In addition, a small Made In Occupied Japan (MIOJ) marking is engraved on the underside of the shoe foot, indicating manufacture in Japan during the Allied occupation. One can sense the sentiments of those who were involved in its production at the time.

Selectable focal lengths are 35/50/73/85/90/105/135mm. Parallax correction is indicated in feet. As it does not yet support 28mm, there is no internal thread at the front for a 28mm adapter.

This example was supplied for Leica use. In addition to the 73mm and 90mm focal lengths, which do not exist in the Nikon lineup but are found in Leica lenses, the side is engraved with 24x36, the Leica format frame size.
For reference, Nikon cameras started with the 24x32 format in the Nikon I, followed by 24x34 in the M, MS, and S models, and it was not until the introduction of the S2 that the Leica format 24x36 was adopted.

There are minor signs of use on the exterior, and a very slight mark from a corrected ding on one side of the accessory shoe foot. However, overall it remains in excellent cosmetic condition, hardly believable for an item that is approximately 75 years old.
It was professionally overhauled in January 2026, and all mechanisms operate smoothly. The glass has also been cleaned, providing a clear and pleasant view.
Included is the original leather case without a logo, as supplied with early upright image universal finders.
A rare item, ideal for a collection.