My father in law brought this home from his fathers farm, which he bought in the 30's or 40's. Its been sitting there ever since. The serial number is D2087
One of the labels shows a date June 1918 but it may be referencing a patent. The grader appears to be complete, its just partially dismantled to fit on the trailer. He wants me to find out what its worth and sell it on ebay, but I would rather sell it to a real enthusiast like you fellas seem to be. You can email me directly at Slarsonroy@L2speed.net Thanks!