Monster Color! I love the year too ... 1928 ... that was the last full happy year of the optimistic roaring twenties. Sometimes it's easy to forget just how much the world has changed since a coin was minted. Glad this found a good home!
Mine would be the two Lincoln Cent errors that I was credited with pinpointing - 1) http://www.coppercoins.com/lincoln/diestate.php?date=2011&die_id=2011p1do009&die_state=mds 2) http://www.coppercoins.com/lincoln/diestate.php?date=2000&die_id=2000p1dr013&die_state=mds
This might be my favorite Proof "Zincoln" from my collection. PCGS PR69RB. Although I do think that PCGS blew the color designation and this should be a PR69BN.
These are made by different companies around the country & world. I do have some for sale. I should, probably, post the ones I have for sale, right? Duh!