Silma Sonik 8. motor drive belt. There are too many.
SILMA SONIK 8 - 8mm Cine Film Projector Motor Drive Belt
ELMO ST-800 Drive Belts For Super 8mm Cine Film Projector (Set of 2)
TACNON 707 Drive Belts For Super 8mm Sound Cine Film Projector (Set of 2)
ELMO FP-C Drive Belts For 8mm Movie Film Projector (Set of 2)
SILMA 240S - Standard 8mm Cine Film Projector Drive Belt
SILMA S111 Dual 8mm Cine Film Projector Drive Belt
