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Kōwadō (光和堂) was a Japanese sales company in the mid-1950s. It was listed as an authorized dealer of the Minon Six III made by Yamato Kōki Kōgyō in 1954; its address at the time was Fukuoka-shi Kamidoimachi 22 (福岡市上土居町30), in the island of Kyūshū.
- ↑ Advertisement dated July 1954 reproduced in Kokusan kamera no rekishi, p.198. A similar advertisement is visible here at Shashin-Bako.
- Asahi Camera (アサヒカメラ) editorial staff. Shōwa 10–40nen kōkoku ni miru kokusan kamera no rekishi (昭和10–40年広告にみる国産カメラの歴史, Japanese camera history as seen in advertisements, 1935–1965). Tokyo: Asahi Shinbunsha, 1994. ISBN 4-02-330312-7.
- Advertisement for the Minon Six published in 1954, reproduced in a page of Japanese postwar advertisements at the Shashin-Bako website