Bw(Manchuria Opt. Ind. Co.)

Manchuria Optical Industry co. was founded in 1938 by Nippon Kogaku
under strong request of Kanto-Gun (Gwandong army) to fill the growing
need for optical munition in the war with China.
They first started with repairing of gun sights then to a mass production of
13nen shiki binoculars and other gun sights. Manchuria Opt binos can be
easily found in mainland Japanbecause many soldiers brought them back.

13nenshikiManshu Kogaku 13nen shiki binos.
The most easily found of Manshu Kogaku optics.
99shikiType 99 light machine gun sight.