Mark WP #47 is one of the rare roof marks.  It has the kanji symbol Wa 和 under a roof.  Wa 和 means harmony.

This float has a perfect stamp with very little wear showing on the surface of the glass.

In Walt Pich's 'Glass Ball Marks' book, he mentions that mark WP #47 has been found on 16 inch floats.  Since this float is 12 inches it may be even more rare than the 'rare' 16 inch size float.

This float has excellent provenance having been found in Japan by Kala & Aragon Ellwanger in 2020.