-- Specifications & Features -- Make: David Bradley / Sears Roebuck & Co. U.S.A. Model: 917 5756. Series: 304. Item Type: Vintage Walk-Behind Tractor Chassis. David Bradley 917 57524 Walk-Behind Tractor Cultivator Attachment Make: David Bradley / Sears, Roebuck and Co. Model: 917 57524. Type: Walk-Behind Tractor Cultivator Attachment. -- Seller Statement -- -- Contact -- Specialist: Zak Bontrager, 260-221-2628. General Inquiries, Payment, Bidding Direction, Registration, and Loadout: Main Office, (574) 825-0704. Financing: 1 (833) 458-6210.