1973 – Mr. Tetsu the Green Stamping Robot – Jiro Aizawa (Japanese)

Mr. Testu [Tetsu-Kun], unconfirmed name, also called Mr. Stamp. I've dated him as 1973, but I've also seen a reference to 1971. Mr. Tetsu on display after being restored at the Kanagawa Institute of Technology in Japan, 2008. The author with Mr. Tetsu in November, 2010. See the full Jiro Aizawa story here .

1940-70 – Mini Musician Robots – Jiro Aizawa (Japanese)

(Source: Mechanix illustrated September 1951) Robots in Ragtime The Japanese have come up with something new in toys. It’s a mechanical orchestra and its tinny music has captured the hearts of the youngsters. Jiro Aizawa, an ex-Kamikaze plane designer, is the creator. Loath to discard his mechanical training after the war, he turned to experimentation …

1967 – Mr. Ryo the Drawing Robot – Jiro Aizawa (Japanese)

Mr. Ryo [Ryo-Kun] on display after his restoration. Ryo-Kun during  restoration at the Kanagawa Institute of Technology in Japan in 2008. The robot's left arm follows the X-Y directions from a master arm seen here at the base being guided by a person. Close-up of the drawing hand. Close-up of the master arm. I do …