This is a used, but like new 305mm APO-Nikkor lens from a high-quality
process camera. It has stops from f9 to f128 (!), as well as a slot
for filters or waterhouse stops.

This lens can be used as an enlarging lens as well as a "taking" lens.
Alegedly, Ansel Adams used this very lens on his horizontal enlarger.

The design of this lens is four air-spaced elements. It is of the
Dialyte design and adequately covers 8X10 at f22 without a lot of
movement. On a 5X7 or 4X5 camera, you'll have movement aplenty.

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