Vintage RARE Boy Scout Metal Whistle w/Leather Neck Strap

Vintage RARE Boy Scouts Metal Whistle, Boy Scout logo embossed on the top, inside has the cork ball to make the loud whistle sound. The original leather neck strap is still attached, there is some green tarnishing areas, not sure what type of metal it’s made of, I have not tried to clean it off. See pictures for the measurements. Good condition for the age.