Here's an uncommon maker's mark WP #214 stamped on a 3 inch float. Mark WP #214 is easily identified since it simply depicts 3 interlocking rings.
It is quite unusual to find this mark stamped on glass balls. This mark is typically found stamped on Tohoku rollers.
This is an authentic Japanese glass fishing float that show signs of use. It is mostly covered with net pattern frosting.
Beachcombed on Kunashir Island, Russia. Kunashir Island is part of the Kurile Islands located just north of Japan.