I have a PF Vader and Ben, and they are both numbered on the bottom of the base, so I'd assume all of their PF would be the same. But perhaps with it being a Xmas-themed item, they didn't feel it was necessary? That would seem odd though.
edit - Do you mean the 1/6 scale figure? I found it on SS's site
, but they don't seem to list the edition size. Strange. I'm pretty sure the 1/6 figures usually have a set edition as well.