Column on the Simlar f/0.7 (Dec. 1951)
Anonymous article in Asahi Camera (アサヒカメラ) December 1951.
Document owned and scanned by Rebollo_fr. It is in public domain, as are all anonymous works published more than fifty years ago in Japan.
See also the Camera-wiki page about Simlar lenses.
Taken in December 1951