This is an Authentic Vintage Glass Float in great condition. There are a few scratches on the glass that comes with being beached and etched on with sand. The diameter of the glass float is 12″. The length of the float (from glass float to tip of extension) is 17.5″. The weight of this item is 10.8 pounds.
The earliest evidence of glass floats being used by fishermen comes from Norway in 1844 where glass floats were on gill nets in the great cod fisheries in Lofoten. By the 1940s, glass had replaced wood or cork throughout much of Europe, Russia, North America, and Japan. Japan started using the glass floats as early as 1910. Today, most of the remaining glass floats originated in Japan because it had a large deep sea fishing industry which made extensive use of the floats; some made by Taiwan, Korea and China. In Japanese, the floats are variably known as ukidama (浮き玉, buoy balls) or bindama (ビン玉, glass balls). (reliable information courtesy of Wikipedia)