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Yachiyo Kōgaku Kōgyōsho (八千代光学工業所) was a Japanese optical company. Its address in 1943 was Tokyo, Takinogawa-ku Kaminakazato 510 (東京都滝野川区上中里510).[1] It is listed in the government inquiry compiled in April 1943 as the maker of the three-element Zeitax 75/3.5 and 75/4.5 lenses of the Semi Condor and Semi Zeitax.[2]

Notes Edit

  1. "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras").
  2. "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras"), lens items Lb2 and Lc8.

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