Card Identification Forum

I have a Barry sanders card that appears to be from one of these proof sets:

https://www.tcdb.com/Inserts.cfm/sid/83500/1998-Collector's-Edge-Super-Bowl-Card-Show

But none of the sets listed have a blank back and I can't find any information about it elsewhere. The card does not appear to be tampered with. Maybe it's a printing error (somehow they just missed the whole back of the card??).  Anyone know anything about this?

Thanks,

Tom

Likely unfinished card from CE bankruptcy. Not something that would be listed here.

I also have one of these in my collection. It's a Brett Favre NFC Gold Logo (not the proof version). I think I've seen some on COMC before but can't say for sure.