Heavily used 14 inch float with maker's mark WP #3 'Kita' 北 or FF. The mark on the ID patch is quite faint but still visible upon closer inspection.
I think this is a classic example of a coke bottle colored 14 inch float.
There is also some nice swirling in the glass from spinning in the mold.
On a personal note, this float was the first one I purchased on eBay.