Quoted from frenchmarky:
Looking at the different cabinets (and mine) I could swear there must have been more than one stencil.
Very likely. I used to recreate pinball sideart for 3d virtual models and this was true for just about every stenciled cab I redid. Photos of different cabs showed slight, and somtimes not so slight, variations in the artwork from game to game. Plus, what was the run on Black Knight, 13000 plus another 600 for the limited edition? They sure weren't going to have one guy painting them one at a time.
Pinbot is another example, there are cabs where the orange artwork is all connected just underneath the coindoor, and cabs where it's broken into three separate parts.