Asanuma catalogue (Jul. 1938): Auto Minolta
Auto Minolta in the July 1938 catalogue by Asanuma Shōkai, pp.4–5, and in the corresponding price list, p.4.
Document owned by A. Apra and scanned by Rebollo_fr. It is in public domain, as are all anonymous documents published in Japan more than fifty years ago.
See also the Camera-wiki page about the Auto Minolta.