Watch List notes:

British Coins and Tokens, Charles II, crown, 1666, edge XVIII, second laureate bust r., rev. crowned cruciform shields, interlinked Cs in angles, (ESC, Bull 366; 32; S. 3355), water-marked (?) surface, good fine, scarce
The year of the Great Fire of London which, it would be nice to imagine, might explain the surface of the coin.
(400-600 GBP)