Nice find Mark. Is that a "GS" at the top of the pin?
Info from the link below
Tenderfoot Pin
1918-1923
The Traditional Logo Girl Scout pin was once called the Tenderfoot Pin. The symbolic design of the pin, according to The Girl Scout Collector's Guide, is as follows:"the eagle is a symbol of strength and victory and the shield on the eagle's breast signifies self-reliance. In his talons, he clutches on his right an oliver branch, the symbol of peace and on his left a shaft of arrows, the symbol of might. The eagle faces right, which is the position of honor, looking toward the symbol of peace. The eagle and shield within the trefoil signify that Girl Scouts stand ready to serve their country." The shape of the pin, a trefoil, indicates the threefold promise.