USA, fraternal order identification medal, late 19th-early 20th century

USA, medal, no date (late 19th-early 20th century), Obverse: triangular arms, BROTHERHOOD OF LOCOMOTIVE FIREMEN AND ENGINEMEN GRAND LODGE ORGANIZED DEC. 1, 1873, Reverse: MEMBER OF LODGE No., (unengraved), Edge: plain, silver plate, 36mm, 17.85g, edge bumps, toned XF