Miyagawa Seisakusho (宮川製作所) was a Japanese company from as early as 1935. It made the Picny 3×4 camera and the Boltax and Bolty cameras using Bolta film. It is called Miyagawa Seiundō (宮川星雲堂) in the April 1943 government inquiry on Japanese camera production; its address at the time was Tōkyō-to Nakano-ku Kami-chō 131 (東京都中野区上町131).
The company survived the war. It perhaps made the Silver, a continuation of the Boltax with auto-stop advance. In 1948, it released the Picny B, a redesigned camera taking Bolta film. The Picny 35 and Royal 35 were derivatives taking perforated 35mm film. Miyagawa perhaps also made other cameras called Royal before disappearing.
The Royal Senior is related to the Royal 35 and was perhaps made by Miyagawa.
The Royal Junior is certainly related to the Royal Senior and was perhaps made by Miyagawa.
- ↑ "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras").
- 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.
- "Kokusan shashinki no genjōchōsa" (国産写真機ノ現状調査, Inquiry into Japanese cameras), listing Japanese camera production as of April 1943. Reproduced in Supuringu kamera de ikou: Zen 69 kishu no shōkai to tsukaikata (スプリングカメラでいこう: 全69機種の紹介と使い方, Let's try spring cameras: Presentation and use of 69 machines). Tokyo: Shashinkogyo Syuppan-sha, 2004. ISBN 4-87956-072-3. Pp.180–7.
- Sugiyama, Kōichi (杉山浩一); Naoi, Hiroaki (直井浩明); Bullock, John R. The Collector's Guide to Japanese Cameras. 国産カメラ図鑑 (Kokusan kamera zukan). Tokyo: Asahi Sonorama, 1985. ISBN 4-257-03187-5.