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.