Right-angle prism, optical glass, with case, KN, Nakamura Rikagaku Kogyo, Showa era, vintage item

Right-Angle Prism Optical Glass with Case KN Nakmura Rikagaku Kogyo Showa Era Vintage Item

- Brand: Nakmura Rikagaku Kogyo
- Model Name: Right-Angle Prism
- Accessories: Comes with case
- Material: Optical Glass
Dimensions (mm): Hypotenuse 59, Sides 42, Thickness 26
Measurements are amateur, so there may be errors.
Weight including case: 99g

This is an old item from the Showa era, and the size appears to be different from currently sold items.
The case has some damage, so it is listed as scratched, but
the prism itself appears to have no noticeable scratches. (Please understand this is based on amateur inspection.)

We kindly ask for your understanding of the above before purchasing.