The medal's obverse bears conjoined busts of composers Handel and Haydn facing right. Around, · HANDEL AND HAYDN SOCIETY · 1815 - 1915 ·
The reverse bears Society's seal over CENTENARY FESTIVAL / HANDEL AND HAYDN / SOCIETY / 1915
The Handel and Haydn Society s an American chorus and period instrument orchestra based in Boston, Massachusetts. Founded in 1815, it is the third oldest musical organization in the United States after the Stoughton Musical Society (founded in 1786) and the U.S. Marine Band (founded 1798), and the oldest continually performing arts organization in the United States.
While the medal is unsigned, Dick Johnson attributes it the Swanson based on its style. I am perfectly happy to follow the great numismatist's lead.
The circular medal measures 63.3mm in idiameter and was struck in bronze by the Whitehead & Hoag Company of Newark, New Jersey. No mintage is reported.