This float has two maker's marks.  One is WP #24 'Shi' シ.  The other mark is WP #118 'Sa' サ.

This stamp seems to be somewhat different than WP #125 because the marks are far apart and appear to be separately applied rather than by one stamp.

This float is also larger than the typical 3 inch floats that are stamped with WP #125.  It measures 13 1/4 inches in circumference or about 4 1/4 inches in diameter.

Found in Northern Japan.

This float has excellent provenance having come from the ex-Jerry Wightman collection.