| | 1969 - 1974 |
| Industrial Crawler tractor |
|
| HD-21 ↑ |
| Series: | HD-21 Series B |
| Allis Chalmers HD-21 Series B Tracks |
| Page information |
| Last update | July 10, 2020
|
| Copyright | Copyright 2020 TractorData LLC
|
| Contact | Peter@TractorData.com
|
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