It's hard to pick just one. There's the T209-1 scrap that I've posted a few times, e.g. here:
http://www.net54baseball.com/showpos...1&postcount=32. And other cards that just look nice.
But I think I'll go with my T206 Quinn Broadleaf 350, which is one of my favorites as a T206 back collector. I got it from a David Festberg auction over 20 years ago for about $60, and I don't even want to think about what it would go for now. Neither PSA nor SGC has ever graded one (since they started keeping track of T206 backs), and T206resource.com lists it as "Unconfirmed", so it may be the only one out there, though I'm inclined to think there's probably another raw one out there somewhere. It's been sitting in an 18-pocket plastic sheet in one of my binders for the past 20+ years, and rather than try to take it out to scan it, I just scanned the entire binder page, front and back. (The whole thing wouldn't quite fit on my scanner bed, so a little bit is cut off on each scan.) I put together this page around 1994 or 1995 to show off my T206 back collection up to that point, including one of the two Lenoxes I had owned since about 1980. As usual with such scans, the leftmost cards in the front scan are the rightmost ones in the back scan, and vice versa.
