That 1921 Lincoln is the earliest coin I have ever found in the reject tray of a Coinstar. I have found quite a few coins, including a 1943 steelie the other day, but this is the earliest coin I have found in the reject tray.
What do you mean by "reject tray"? I have heard a few people mention it, but I have never seen one...
The Reject Tray is the coin return where the machine spits out anything it doesn't like. People tend to forget to check there when they are done and you can find some unusual items.