Jam in bullet seating step, imprint of next round in top of jammed round.
Is that a factory round??? If so, was it actually found in a box???
It is a factory round, but not found in a box. The tech had to clear it from the machine.
This is a great / fun, but small collecting niche due to the rarity of these items that’s a lot like collecting error coins in numismatics. I had one a couple years ago that was a 9mm case with no extractor groove, and still have another that is an upside-down loaded bullet, and also a .45acp load with a double stamp / crushed-bullet similar to the 9mm shown.