This is a D specially modified for industrial use. It is being used in Febuary 1926 with an Adams No. 6 road maintainer. The tractor also has a AD103R muffler. This was a "field demonstration". You can tell the picture was posed; the flywheel isn't moving! Or maybe really fast film!

Color Photo Source: How JohnnyPopper Replaced the Horse

See another early industrial D, here.

See more pictures of Adams Graders, Here


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