This is a A-21A513 Ignition Coil, 12 VOLT, Internal Resistor PN: 21A513Main Description As Following : A-21A513 Ignition Coil, 12 VOLT, Internal Resistor P.N: 21A513 12 Volt With Internal Resistor (Without Series Resistance)Dim A (1): 12 VoltReplaces: 100402A, 70143, Delco 1115043 Replaces: AA4879R JOHN DEERE , AA4983R JOHN DEERE , A-AT10399 JOHN DEERE , A-D2AF12029AA FORD , A-1115043 CASE , A-161861A WHITE TRACTOR , A-189673M1 MASSEY FERGUSON , A-189673M92 ALLIS CHALMERS , 353875R91 CASE/INTERNATIONAL HAR. , 395331R91 CASE/INTERNATIONAL HAR. , 395331R92 CASE/INTERNATIONAL HAR. , 396330R91 CASE/INTERNATIONAL HAR. , 396330R92 CASE/INTERNATIONAL HAR. , 396547R91 CASE/INTERNATIONAL HAR. , 396547R92 CASE/INTERNATIONAL HAR. , A-396547R93 CASE/INTERNATIONAL HAR. , A-74515665 ALLIS CHALMERS , Crossed From: AV101417 VAPORMATIC , D5TE12029AB , , 100402A ALLIS-CHALMERS Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 12 Volt Replaces: 100402A, 70143, Delco 1115043