I would presume that all Mausers, at least 98s, were chewed out of forgings, handle and all. Looks that way from the various milling marks.
As for attaching at the factory, I doubt that much. Even those of us who butcher, or have butchered, the bolt handles know that a properly welded-on bolt handle is just as sound as virgin forged steel.
But yeah, these Mauser pictures are making me jealous for another FN or Sears or HandR or Husky.
