Like the '94 Favre Throwback jersey that Eric mentions, the same can apparently be said for the '94 Broncos Thowbacks of Elway--particularly the white "road" variation.

This jersey was worn for for only one game on Sep 26 @ Buffalo. In the late 90s we had purchased, owned and subsequently sold (in good faith) what we believed at that time was the one and only game-worn jersey from this game. We subsequenetly learned, however, that several of these "unique" jerseys exist. AMI of Las Vegas has auctioned at least two if not three different jerseys of this type (all authenticated by Lou Lampson), one in Oct 2004 and a second in Apr of '05 (each was auto'd in a differnt color Sharpie). There was also a 3rd unautographed jersey that was auctioned by AMI in 2002, which they argued may have been one of the same two previously mentioned that had since been signed (granted).
Not to pick on AMI, Grey Flannel was apparently in on the action as well. Not only did they authenticate the jersey which mentioned above as having owned at one time (LOA #M.N. 949B), but that also authenticated at least two others that we were made aware of as well (LOA #R.V. 342E and Lot #1130, 5/2001)

For additional details, see article "Unique" Elway Jerseys Aboud on our web site at http://endzone.pscoggin.com/gunews.htm