Unrecorded 1860 (Gouby J+g; Freeman 6+G)
This coin appeared on Ebay in January 2009 and appears to have a die combination unrecorded for 1860 pennies. However, the final date figure does show signs of possible tooling/tampering and the Royal Mint, who has examined the coin, concurs that it has been tampered with.
Pictures and description courtesy of Michael Gouby