This is a brand aftermarket Ford tractor alternator. This fits models 230A, 231, 2310, 233, 234, 2600, 2600V, 2610, 2810, 2910, 333, 334, 335, 3600, 3600V, 3610, 3900, 3910, 4110, 420, 455, 4600, 4600SU, 4610, 5110, 515, 530A, 531, 532, 535, 555, 555A,...