Ceci est la version industrielle d'Allis Chalmers D21. The Industrial D21 was the most powerful D21 with series 1 having 103 HP and series 2 having 127 as the normal came with 93 HP for the series 1 and 116 for the series 2 and the 60th Anniversary edition was upgraded to 103 HP for the series 1 and 121 for series 2. USA Agriculture converted the original version, North Woods Farmer reskinned it to the 60th Anniversary version and added a cabbed option, and I reskinned it to la version industrielle. Série 1 1963-1965 Série 2 1965-1969.