M-R-S Tractors
M-R-S Manufacturing was a manufacturer of four-wheel drive tractors and construction machinery, notably scrapers. M-R-S roots began with the Mississippi Road Supply Company in 1927, a distributor of International Harvester and other construction equipment. M-R-S later began assembling large tractors using engine and transmission components from other vendors. M-R-S entered bankruptcy in 1987.
M-R-S Tractors
| M-R-S A-80 | Power: 134 hp | Date of manufacture : 1964 - 1967 |
| M-R-S A-80B | Power: 141 hp | Date of manufacture : 1967 - 1980 |
| M-R-S A-85 | Power: 202 hp | Date of manufacture : 1977 - 1980 |
| M-R-S A-90 | Power: 123 hp | Date of manufacture : 1962 - 1963 |
| M-R-S A-90B | Power: 0 | Date of manufacture : 1964 - 1970 |
| M-R-S A-92 | Power: 238 hp | Date of manufacture : 1977 - 1980 |
| M-R-S A-95 | Power: 186 hp | Date of manufacture : 1966 - 1980 |
| M-R-S A-100 | Power: 0 | Date of manufacture : 1962 - 1980 |
| M-R-S A-105 | Power: 0 | Date of manufacture : 1964 - 1967 |
| M-R-S A-110 | Power: 0 | Date of manufacture : 1964 - 0000 |