Esca and Rolly
In 1955, the company became Rolly Kōgaku K.K. (ローリー光学㈱) and the camera was renamed accordingly as the Rolly Flex. In December 1955, the address of the headquarters was Arakawa-ku Ogu-machi (荒川区尾久町) 3–2101, again in Tokyo, whereas the sales department (営業部) and the main plant were still at the Nagasaki 1–26 address; a secondary plant was also mentioned at Nerima-ku Minami-machi (練馬区南町) 2–3825. The company probably disappeared in 1956.
- 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.