What a treasure.  I have always dreamed of finding a chain cent.  They are incredibly rare, but this one is incredibly abused.  It took a ton of work to get a pic to prove that it was a chain cent.  Only a handful have ever been posted on find forums, and this was nominated for a banner find (not selected), so I have no idea how to rank it on my finds list.  It was cool to find, but coppers in our acidic soil never come out good.  Here is the original blog entry.

Found: 12-Sep-2019; Location: old farmhouse; Machine: E-Trac.