This is a A-21A552 Ignition Coil - 6 Volt W/O External Resistor or 12 Volt W/ External Resistor PN: 21A552Main Description As Following : A-21A552 Ignition Coil - 6 Volt W/O External Resistor or 12 Volt W/ External Resistor P.N: 21A552 A-21A552 Ignition Coil - 6 Volt W/O External Resistor or 12 Volt W/ External Resistor P.N: 21A552 Replaces: AM373T JOHN DEERE , AM791T JOHN DEERE , A-AR46064 JOHN DEERE , A-D4PE12029AA FORD , A-1024481M1 MASSEY FERGUSON , A-1055357M1 MASSEY FERGUSON , 1115084 CASE/INTERNATIONAL HAR. , 1115098 CASE/INTERNATIONAL HAR. , A-1115380 RIVERSIDE TRACTOR , A-1115381 CASE , 1115407 CASE/INTERNATIONAL HAR. , 21A515 JOHN DEERE , A-225694 ALLIS CHALMERS , A-303014967 WHITE TRACTOR , 353874R91 CASE/INTERNATIONAL HAR. , 365783R91 CASE/INTERNATIONAL HAR. , 368839R91 CASE/INTERNATIONAL HAR. , 395330R91 CASE/INTERNATIONAL HAR. , 395330R92 CASE/INTERNATIONAL HAR. , 396329R91 CASE/INTERNATIONAL HAR. Found in Section & Models : Ignition & Electrical Parts > Engine Related Parts, John Deere TRACTOR: 3010, John Deere TRACTOR: 3020, John Deere TRACTOR: 4000, John Deere TRACTOR: 4010 (SN <280000), John Deere TRACTOR: 4020 (SN <280000) Associated Items : A-8NE10306 Also A-FRM-JD, A-JD-O-OMR32385, A-JD-P-PC736, A-JD-S-SM2038, A-SMJD203, A-FRM-JD, A-JD-O-OMR34406, A-JD-O-OMR41753, A-JD-O-OMR46012, A-JD-O-OMR48271, A-JD-P-PC1115, A-JD-P-PC858, A-JD-S-SM2038, A-JD-S-TM1005, A-SMJD203, A-JD-O-OMR46934, A-JD-O-OMR48273, A-JD-P-PC1116, A-JD-S-TM1006, A-SMJD203 And : 12 volt requires external resistor part# 8NE10306. See associated items.