Classic Machines TractorsClassic Machines: The Allis-Chalmers HD-16 tractorCharles FairbairnMarch 30, 2016August 14, 2018 by Charles FairbairnMarch 30, 2016August 14, 2018 Replacing the previous model HD-15 in the Allis-Chalmers line of track type tractors the HD-16 was introduced with much fanfare in 1955. By Richard Campbell
