Uni Pro – KM 356 Mechanical Semi-Suspension Seat Assembly – Black Vinyl. Uni Pro 550 Seat Top Assembly for David Brown or International Harvester Tractors – Black Vinyl. Small tear in the vinyl under the backrest. Lots of life left. Upgrade select David Brown® and International Harvester® equipment with this Uni Pro 550 seat top assembly, a high-quality replacement seat designed to deliver maximum comfort during long hours on the job. Built with ergonomic cushions and heavy-duty materials, this seat ensures a comfortable and stable ride, even during long hours on the job. Durable black vinyl covering resists wear and tear for long-lasting use. Contoured, vacuum-formed foam cushions provide superior comfort and ergonomic support. Wraparound-style backrest offers improved stability and ergonomic support. Strong wear resistance to withstand demanding conditions. Pre-attached slide rails provide fore/aft adjustment for optimal positioning. David Brown® Tractor with Original Grammer Seat: 1210. International Harvester® Tractors with Original Grammer Seat: 244, 404, 444, 484, 544, 584, 606, 684, 685, 884, 885, 2404, 2424, 2444, 2544, Hydro 84. Fits David Brown® Tractor models: 885. Fits International Harvester® Tractor models: 1210, 2404, 2424, 244, 2444, 2544, 404, 444, 484, 544, 584, 606, 684, 685, 884, Hydro 84, Steiger 600. Track Page Views With.