Product description:
General Electric THM66YS20FC Power Break Circuit Breaker; 2000 amp, 600 volt AC, 3 pole. With auxiliary switch, shunt trip- 120 to 240 volt AC, manually operated (M/O), used tested with report.
MC-CB # 1030 -- LOC: 1T3 MC-CB # 1031 -- LOC: 1T3
MC-CB # 1033 -- LOC: 1S3