Holden logos from 1928 (left) and 1972 (right). GM Holden Model Identification ORIGINAL HOLDEN IDENTIFICATION CODE TABLE: 0 1 2 3 4 5 6 7 8 9 A K J H G F E D C B From the FJ through to the EH, GMH used a simple model identification code. The first letter indicated the decade and the second the year. So FE equals (19)56 and EH equals (19)63. Thus all codes beginning with F (FJ, FE, FC, FB) are '50s models, those beginning with E (EJ, EH) were for the 1960s.