NGC 1972-S proof Jefferson nickel with a cud as the base of Jefferson's bust. The cud, also known as a "major die break", occurred when a piece of the die adjoining the coin's rim broke and fell away...
NGC 1976-S proof Jefferson nickel with a cud major die break at 5 o'clock on the obverse. The cud is obvious and is scarce because it is on a proof coin. Proof coins are carefully examined for cuds,...
NGC 25c 1973-S proof Washington quarter struck on cent planchet. A dramatic and scarce proof off-metal, with the coin struck on the copper-alloy planchet used for Lincoln cents, but which was instead...