Submarine 707R

Submarine 707R (サブマリン707R Sabumarin Nana Maru Nana Āru) is a two-episode OVA produced by Group TAC and Sony based on a manga titled Submarine 707 (サブマリン707 Sabumarin Nana Maru Nana) by Satoru Ozawa (小沢さとる Ozawa Satoru) released in 1963–1965 in Weekly Shōnen Sunday and although not a mecha robot series, is a "mecha" storyline that spawned plastic models during its time.

Submarine 707R

Submarine 707R (サブマリン707R Sabumarin Nana Maru Nana Āru) is a two-episode OVA produced by Group TAC and Sony based on a manga titled Submarine 707 (サブマリン707 Sabumarin Nana Maru Nana) by Satoru Ozawa (小沢さとる Ozawa Satoru) released in 1963–1965 in Weekly Shōnen Sunday and although not a mecha robot series, is a "mecha" storyline that spawned plastic models during its time.