The 120G class was built by NYC at the their Despatch Shops in 1967 as NYC 720000-720449. 96 cars carried their NYC number to CR becoming CR 576028-578208. The number series is not solid as these cars were renumbered around PC class G43A gons also in the CR 576000-578149 and PC class G43 gons in theCR 578150-578743 series. 350 cars were renumbered into PC series 564000-564449 and then becoming CR 564000-564449. Some cars were renumbered into the 608000 series when converted for coil steel service.