Square Shouldered Sausage floats are pretty rare.
This type of float comes in two colors; blue-green and light green. The light green color is more rare.
It's quite a bit large than standard sausages. It measures 5 1/4 inches in length and is 3 1/2 inches wide.
Found on Honshu Island, Japan.
This float has excellent provenance having come from the ex-Col. Rich Richardson collection.