Joe this is what I found under that part number... it looks to be a high used part.
Carrier, Cargo, Amphibious, Tracked, M116 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Carrier, Cargo, Tracked, 6-Ton, M548 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Command and Reconnaissance Armored, M114 . . . . . . . . . . . . . . . . . . .
Carrier, Command Post, Light, Tracked, M577 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Command Post, Light, Tracked, M577A1 . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Flame Thrower, Self-Propelled, M132 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Flame Thrower, Self-Propelled, M132A1 . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Guided Missile Equipment, Self-Propelled, XM727 . . . . . . . . . . . . . . . .
Carrier, Guided Missile Equipment, XM730 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Mortar, 81-mm, Self-Propelled, M125A1 . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Mortar, 107-mm, Self-Propelled, M106 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Mortar, 107-mm, Self-Propelled, M106A1 . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Personnel, Full Tracked, Armored,M113 . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier, Personnel, Full Tracked, Armored, M113A1 . . . . . . . . . . . . . . . . . . . . . .
Chassis, Gun, Anti-Aircraft Artillery, 20-mm, Self-Propelled,
(XM163 Weapons System) XM741) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Howitzer, Light, Self-Propelled, 105-mm, M108 T195E1) . . . . . . . . . . . . . . . . . . .
Howitzer, Medium, Self-Propelled, 155-mm, M109 (T196E1) . . . . . . . . . . . . . . . .
Rifle, Self-Propelled, Full Tracked, Multi-106-mm, M50A1. . . . . . . . . . . . . . . . . .
Truck, Utility, 1/4 Ton, 4x4, M38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Truck, Utility, 1/4 Ton, 4x4, M38A1 and M170 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Truck, Utility, 1/4 Ton, 4x4, M151 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Truck 3/4 Ton (Family), 4x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Truck, 2-1/2 Ton Family, 6x6, GMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Truck, 2-1/2 Ton (Family), 6x6, REO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Truck, 5 Ton (Family), 6x6 .
It looks like to be anything with a PRESTOLITE Alternator