HD6G Serial Numbers
(located on rear of dozer above rear hitch)
HD6, HD6G, HD6GB
1955 101-1146
1956 1147-6465
1957 6466-7947
1958 7948-10053
1959 10054-12505
1960 12506-13776
1961 13777-14897
1962-14898-16041
1963 16042-17104
1964 17105-18188
1965 18189-19400
1966 19401-20200
1967 20201-21431
1969 21432-22271
1970 22272-23354
1971 23355-24011
1972 24012-24671
1973 24672-25011
1974 25012-25271