Glass Ball Float found in Okinawa 1945

Offered for sale is this vintage 28 inch (this is measured around the rope) blown fishing net float. Float was found on the beach of Okinawa in 1945 by a world war two veteran stationed on the island after the war. please see pictures All original including the rope. Glass has no cracks or chips. As far as I know it had never been washed.....any Questions Please ask and I will answer all the best I can....Thanks for looking ...