The pin was recognition that the wearer had purchased or supported the war effort by buying liberty bonds.
This pin was found at the Willis Dodd Boys Club formerly the Parker Street Hall.
An initialed M.H.S. class pin. The pin came from Folger, 180 Broadway, NY that was in business in the early 1900s. The initials likely refer to Maynard High School although there were few number of graduates (7) in 1907.
The Army-Navy "E" Award was an honor presented to companies during World War II whose production facilities achieved "Excellence in Production" ("E") of war equipment. The employees received the pin.