This is an extremely rare Hokkaido blue dot roller.
Finding a blue seal on a roller is hard. Blue dots were only found on mini jumbos; until now. As far as I can tell, this float is the only blue dot ever found on a Hokkaido roller that measures 5 1/4 inches. Another Hokkaido roller with a dark blue seal sold on Facebook in the DOND group in 2022.
It's the smaller size Hokkaido roller measuring about 5 1/4 inches in length.
This roller is a light green color.