I've never been a hardcore collector of limited editions or anything specifically, so I don't know much. However, aren't so-called "limited editions" identified as such by being numbered?

I don't have any Bowie titles to refer to, but was gifted with a Grateful Dead limited edition, which is #00136 (assuming out of 10,000 total). ???

"You've gotta laugh when you can't cry no more." - DOT 3, "Palo Alto's finest voodoo funk band"