Jeff S dubbed that kind of rebuilt starter a Frankenstein .That describes the typical rebuild process and intermixing of parts from others pretty accurately.
To illustrate the mixing and matching that went on I've posted below a rebuilt starter out of a small block Ford where the main body was obviously part of another starter originally and is stamped - AMERICAN MOTORS
Testifying to the interchangeability and that the re-builders really didn't care as long as it worked and it could be sold
If you look up the part number you will find that the starter, along with the Ford ones, can be used in some American Motors applications as well as Jeep so no telling what markings you can find on some of the parts that make up a rebuilt starter. Have seen similar practices on rebuilt master cylinders with some interesting configurations as I knopw Bob G has.
The tall nut is another rebuild characteristic.
Taller nut with new cable attachment stud was often a fix for a damaged original attaching stud and is often made a a different material than the original steel stud
Original stud, retaining and cable nut in the lower right