I think I found a complete ticket to the 1956 Indiana-Kentucky High School All-Star Game in this auction.
Seen in the fourth picture near the Pacers button.
It should be his second to last game as a high school player. He scored 34 points as he and Indiana beat Kentucky. The date and location match my research.
There was another game at a different venue on June 25th 1956 where he scored 41 I believe.
I'm not sure of the monetary value, but it's definitely important for basketball / Robertson fans.
The auction does not ship, and therefore I can't bid on it. I just messaged the auctioneer to note that ticket's importance because I really don't want it thrown away by someone buying the assorted junk.
If anyone here is a Big O fan, and lives around Indiana. This may be worthwhile for you.
The only other ticket I can find of this game is
live on ebay right now too. It appears to be in worse shape, and only has print on one side. No bids at $100. I'm not sure why this ticket is so different, but whatever. The print is the same.
* I'm not affiliated with either auction. I'm merely trying to preserve something interesting.