Here’s my favorite counter stamp. It’s Oil of Ice on an 1873 Indian Head Cent and a 1866 Shield Nickel. This was when his stroke was active. I’m missing the Two Cent Piece but I’ll find one as I keep looking. Both coins have a clear and undamaged counter stamp which didn’t damage the coin either.
I don't believe the two Jeffersons are his though both were struck by the same mint that strikes some of his examples. The number of coins JBK has issued using various dies is enormous. Bruce