Thanks Sven. In fact my question will only be fully answered if we find another copy of this promo with the same number (21 or 25) but with a different name. I think it is very likely that this will happen someday, because it is hard to believe that only 25 of these promos were made in the UK.
Billy Corgan, December 2, 2008 : "Not everyone understands our death trip. But you do. And that's what matters."