R3713-Tractor"Water" Radiator Cap for Oliver, IH Farmall, Massey, MM, and AC Original Style with Water Imprint for Non - Pressurized System Fits Oliver 60, 66, 70, 77, 88, Super 55, Super 66 Fits IH Farmall A, B, C, H, I-4, I-6, T-9, M, O-4, O-6, Super A, W-4, W-6, W-9 Fits Massey-Harris Challenger and Pacemaker Fits Allis Chalmers WF, and Minneapolis Moline Avery A