This Cranberry Dot float is stamped with mark WP #248 'Otera' 寺. To float collectors, it's also known as the 'Temple' mark.
The seal on this float is a deep cranberry color. Unfortunately, there's considerable chipping on the edges of the seal.
This float measures about 2 1/2 inches in diameter and was probably made for a Tako jig. Tako translates to Octopus in Japanese.