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Ryūbi Seisakusho (隆美製作所) was a Japanese camera maker, which made the Monade Flex in 1953 and the Rubyflex. Nothing else is known about this company.
- ↑ Kokusan kamera no rekishi, p.370.
- 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.