Serial numbers (all series) according to plant of manufacture:
| Flint, Michigan |
14801266 to 15020983 |
| Southgate, California |
24820001 to 25003031 |
| Linden, New Jersey |
34824001 to 50004975
|
| Kansas City, Kansas |
44830001 to 45008155 |
| |
|
| Engine Numbers |
|
| Special Series 40 |
began with 4999881-4 to 52220971-4
(4 denotes Series 40) |
| Super Series 50 |
began with 4999881-5 to 52220971-5
(5 denotes Series 50) |
| Super Series 70 |
began with 4999881-7 to 52220971-7
(7 denotes Series 70) |
|
