Nice example of mark WP #7-A 'Maru Se' ㋝. The stamp is bold and complete. This mark has the Otaru T symbol in a circle.
This float has lots of bubbles and some swirling on the surface of the glass.
It measures 2 1/2 inches in diameter.
Found in Northern Japan.
This float has excellent provenance having come from the ex-Ramon Fulton collection.