Nice 7 inch float with WP #3 Kita 北 or 'FF' mark.
This float is a bit unusual for 7 inch floats because the stamp is on a separate ID seal. These 7 inch floats can be found with stamps on the seal button or the ID seal. From my experience, it seems that the floats with ID seals are less common.
There is net pattern frosting over the bottom half of the float.