I thought that tag was for text printing.

nipp: 浮世絵の彫師と摺師
彼らはあらゆる技量を駆使し、1枚の墨版(すみはん)〔主版(おもはん)〕を仕上げるのであるが、墨版は最後に「見当(けんとう)」を彫り込んで完了する。

https://takezasado.com/?pid=147506616
伝統木版画工房がお届けする 浮世絵の主版（おもはん）


https://woodblock-print.eu/faq/glossary/58-daiban.html
Omohan
also sumi-ta (black ink block); jizumi-ita; sumizuri-no-ita or daihan
The most important woodblock carved to create the outline. Also called the key-block. Cut by the engraver from the artist’s original drawing.
https://www.kumon-ukiyoe.jp/en/flow.php
Based on this final sketch, the horishi carves a monochrome version on the woodblock called an omohan.
主版	522

[print]?