12 volt, 55 amp negative ground alternator with external regulator. Fits IH tractor models: 460, 560, 660 series, 1960 and up, 606, 656, 706, 806, 404, 504, Diesels 460, 560, 660, 656, 706, 806. Replaces 1553 and 1561

12 volt, 63 amp negative ground alternator with internal regulator. One Wire Self-Exciting Fits various IH tractor Models

OEM style amp gauge for IH tractor models: H, Super H, M, Super M, Super MD, Super MTA, W, Super W series, (1947 to 1954); Super A, Super AV, (1947 to 1954); C, Super C, (1947 to 1954); 200 and 230. 20-20 Amp range