| Machine S/N Base | Machine S/N First | Machine S/N Last |
|---|---|---|
| 21A | 270 | 299 |
| Category: Bulldog Gasket Kits -> Caterpillar -> Engine (Cat Kit Numbers) -> Pipelayers | ||
| 21A | 300 | 331 |
| Category: Bulldog Gasket Kits -> Caterpillar -> Engine (Cat Kit Numbers) -> Pipelayers | ||
| 17A | 11879 | 19442 |
| Category: Bulldog Gasket Kits -> Caterpillar -> Engine (Cat Kit Numbers) -> Crawler Tractors (Dozers) | ||