It seems you’re referencing a specific identifier, possibly for a mineral, fossil, or museum specimen.

Here is a useful breakdown and collector's review of the piece.

The imagery reflects the 1968 zeitgeist—a year of global social upheaval that, in Japan, manifested as a tension between the traditional "Yamato Nadeshiko" ideal and the new, independent woman.

Rikitake family archive, Box 119, Folder “Shoko Esumi”, Item 68: A photograph of Shoko Esumi at the 1968 Tokyo International Trade Fair.

: Yasushi Rikitake specialized in shojo (young girl) photography, often categorized within the "Photo-Lolicon" subgenre that was popular in Japan during that era.