Numbers Builder Built Model 30 GM 1957 TDH-4512 31 GM 1956 TDH-4512 32 GM 1955 TDH-4512 33- 35 GM 1954 TDH-4512 43 GM 1967 TDH-4519 45 GM 1957 TDH-4512 46 GM 1960 TDH-4517 47 GM 1961 TDH-4517 48 GM 1962 TDH-4517 49 GM 1963 TDH-4519 50 GM 1953 TDH-4512 52 GM 1966 TDH-4519 53 GM 1967 TDH-4519 54 GM 1965 TDH-4519 55- 56 GM 1967 SDH-4502