Most of this information is from Norm Swinford's Allis Chalmers Farm Equipment 1914-1985
All D15 ag tractors painted Persian Orange #2
| D15 1960 to 1968 | |||
|   | |||
| Serial Numbers: | |||
| Location: Left side of clutch housing | |||
| 1960 | 1001 - 1899 Series I | ||
| 1961 | 1900 - 6469 | ||
| 1962 | 6470 - 8169 | ||
|   | |||
| 1963 | 13001 - 16927 Series II | ||
| 1964 | 16928 - 19680 | ||
| 1965 | 19681 - 21374 | ||
| 1966 | 21375 - 23733 | ||
| 1967 | 23734 - 25126 | ||
| 1968 | 25127 - 25419 | ||
|   | |||
| Comments: | |||
| The yellow industrial tractor had a Shuttle clutch, fixed front axle, and industrial tires. | |||
| S/N | Extrapolated Quantity | Series | Color | |
| 1960 | 1001 - 1899 | 899 | I | Persian Orange #2 |
| 1961 | 1900 - 6469 | 4570 | I | Persian Orange #2 |
| 1962 | 6470 - 8169 | 1700 | I | Persian Orange #2 |
| 1963 | 13001 - 16927 | 3927 | II | Persian Orange #2 |
| 1964 | 16928 - 19680 | 2753 | II | Persian Orange #2 |
| 1965 | 19681 - 21374 | 1694 | II | Persian Orange #2 |
| 1966 | 21375 - 23733 | 2359 | II | Persian Orange #2 |
| 1967 | 23734 - 25126 | 1393 | II | Persian Orange #2 |
| 1968 | 25127 - 25419 | 293 | II | Persian Orange #2 |
| Total | 19588 |