The plow coverboard was designed to help roll over the slice of sod/soil to help bury the top growth which made for cleaner furrows. Though not introduced until later Dearborn and Ford model plows, they were practically standard on most all plows after the 60's. Here are some photos of the ones in my collection. Three have FORD decals on them and are painted Ford Vermillion Red. No part number shown on any of them. Next is a SHERMAN Coverboard-Jointer Dual Duty style. No part number on these either and I have no idea what they were used on. The caramel color suggests they may have been used on industrial plows. Then there is a lone NOS coverboard with a part number, 219290B, but none of my Ford parts books shows this number. I believe by the number it was used on later plows that were introduced in the 60's. None of my early MPC's show coverboards offered as optional equipment. There were moldboard extensions offered for the early Ferguson-Sherman and Dearborn plows, but no coverboards are shown nor listed. If you can expand on coverboards, your comments are welcome.
Tim *PloughNman* Daley(MI)