見竜寺宝蔵古書画帖
A Meiji-era (1893) Japanese picture album of old paintings and calligraphy from a temple treasury, compiled by Shuto Tommatsu and published by Chiba Setsushu. The scans show only a heavy black ring with four white vertical bars, apparently a seal or emblem rather than an illustration, so a designer could take its bold, high-contrast circular mark and graphic simplicity as the main visual idea.
