Blue Dot with mark WP #171 'Asahi' 旭. The blue seal is a very nice dark cobalt blue color.
This netted float measures about 8 1/2 inches around or 2 1/2 inches in diameter.
Provenance is excellent have purchased this float from Kellie Zeschke ex-Ogkyo; from their inventory originating in Hokkaido Island, Japan.