| Chassis number and year of manufacture for Snow-Trac ST4 and Trac-Master/Snow-Master ST4B | |||
| Chassis Numbers | Model Year | Units in Series | Model |
| 57001-57004 | 1957 | 4 | Snow-Trac ST4 |
| 58005-58079 | 1958 | 75 | Snow-Trac ST4 |
| 59080-59129 | 1959 | 50 | Snow-Trac ST4 |
| 130-179 | 1960 | 50 | Snow-Trac ST4 |
| 180-229 | 1961 | 50 | Snow-Trac ST4 |
| 230-329 | 1962 | 100 | Snow-Trac ST4 |
| 330-429 | 1963 | 100 | Snow-Trac ST4 |
| 430-629 | 1964 | 200 | Snow-Trac ST4 |
| 630-729 | 1965 | 100 | Snow-Trac ST4 |
| 730-829 | 1966 | 100 | Snow-Trac ST4 |
| 830-879 | 1967 | 50 | Trac-Master ST4B |
| 880-914 | 1967 | 35 | Snow-Trac ST4 |
| 930-969 | 1967 | 40 | Trac-Master ST4B |
| 915-929,970-1039 | 1968 | 85 | Trac-Master ST4B |
| 1040-1079 | 1968 | 40 | Snow-Trac ST4 |
| 1130-1169 | 1968 | 40 | Trac-Master ST4B |
| 1170-1220 | 1968 | 51 | Snow-Trac ST4 |
| 1221-1295 | 1969 | 75 | Trac-Master ST4B |
| 1296-1375 | 1969 | 80 | Snow-Trac ST4 |
| 1376-1490 | 1970 | 115 | Snow-Trac ST4 |
| 1491-1590 | 1971 | 100 | Snow-Trac ST4 |
| 1591-1610 | 1971 | 20 | Trac-Master ST4B |
| 1611-1620 | 1972 | 10 | Trac-Master ST4B |
| 1621-1650 | 1972 | 30 | Snow-Trac ST4 |
| 1651-1670 | 1973 | 20 | Snow-Master ST4B |
| 1671-1720 | 1974 | 50 | Snow-Trac ST4 |
| 1721-1740 | 1975 | 20 | Snow-Master ST4B |
| 1741-1840 | 1975 | 100 | Snow-Trac ST4 |
| 1841-1865 | 1975 | 25 | Snow-Master ST4B |
| 1866-1970 | 1975 | 45 | Snow-Trac ST4 |
| 1971-1995 | 1976 | 25 | Snow-Master ST4B |
| 1996-2070 | 1977 | 75 | Snow-Trac ST4 |
| 2071-2105 | 1977 | 35 | Snow-Master ST4B |
| 2106-2180 | 1978 | 75 | Snow-Trac ST4 |
| 2181-2205 | 1978 | 25 | Snow-Master ST4B |
| 2206-2240 | 1979 | 25 | Snow-Master ST4B |
| 2241-2265 | 1979 | 25 | Snow-Trac ST4 |
| 2266-2315 | 1980 | 50 | Snow-Trac ST4 |