Carling Circuit Breaker PCD-BA-24-650-12A-A10, 50A, Bass 102-2230-050 (NOS)
These are GFCI sensing breakers. The PC-Series is an AC Residual Current Circuit Breaker with Overcurrent Protection (RCBO) that combines ground fault protection and the familiar overcurrent tripping characteristics of a normal circuit breaker.
Carling Circuit Breaker PCC-BA-24-650-12A-E12, 50A, Bass 102-3339-050 (NOS)
These are GFCI sensing breakers. Pertinent data regarding these breakers are on the label on the breaker. I’ll help the best I can.