This is a A-161861A Coil, Ignition (12 Volt) PN: 161861AMain Description As Following : A-161861A Coil, Ignition (12 Volt) P.N: 161861A Replaces: 100402A, 70143, Delco 1115043 Stocked As: A-21A513 , Crossed From: 20-3010222 , Found in Section & Models : Ignition & Electrical Parts > Ignition & Related Parts, Allis-Chalmers TRACTOR: SEVERAL, White/ Oliver/ Mpl Moline TRACTOR: SEVERAL Associated Items : New Also This is An Aftermarket Product And : Replaces: 100402A, 70143, Delco 1115043