In Reply to: Dearborn disc harrow posted by Kirk-NJ on June 08, 2018 at 04:25:15:
I don't think you have a Dearborn Disc Harrow -see LINK. All the brochures and manuals I have only show a 6' and a 7' model anyway. A Dearborn or even Ferguson-Sherman tag would have been riveted on the upper A-Frame strut. I think yours is actually newer, maybe 70's/80's mfg.