RSA-66G: 

ITE Type ET, ETI, ETO, ET-75, ET-C Molded Case Circuit Breaker - KM Frame (250-800 A, includes KM), KP Frame (250-800 A, includes KP), HP Frame (800-1600 A, includes HP), & CP Frame (800-1600 A, includes CP) - 2, 3 Pole

(Info from their website) 

Loc. A2-3