G.K. Yamamoto Kōjō (㈾山本工場) was a Japanese company, founded in 1914 by Yamamoto Einosuke (山本栄之助) in Asakusa, Tokyo, to make various metal parts.^[1] After the 1923 earthquake, the factory moved to Katsushika, in North-Eastern Tokyo.^[1] It became a subcontractor for Konishiroku, and from 1936 it produced the smaller shutters formerly made in the company's own manufacturing branch Rokuoh-sha, such as the Rox mounted on the Baby Pearl, and perhaps the Echo mounted on the Pearlette.^[2] The Rokuoh-sha factory continued to manufacture the larger shutters, such as the Durax and Apus.^[1]

Notes Edit

1. ↑ ^{1.0 1.1 1.2} This page at R.Konishi Rokuoh-sha.
2. ↑ This page at R.Konishi Rokuoh-sha mentions the Rox "and other small shutters".

Links Edit

In Japanese:

• Hexar lenses and Konishiroku shutters at R.Konishi Rokuoh-sha