1976-S 5c Proof Jefferson Nickel Cud Major Die Break. Scarce.  PF69 Ultra Cameo Note: some minor scratches on the holder, but they are not on the coin. 

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 5c 1976-S proof Jefferson nickel with a cud obverse at 5 o'clock. The cud is large for a proof coin, with all proof cuds on Jefferson nickels being rare, and with few known. This particular cud...

NGC 5c 1976-S proof Jefferson nickel with a cud obverse at 5 o'clock. The cud is large for a proof coin, with all proof cuds on Jefferson nickels being rare, and with few known. This particular cud...

PCGS 1970-D Jefferson nickel with a large cud obverse.  AU50

NGC 1977-S proof Jefferson nickel clashed dies obverse and reverse. The clash marks are strongest on the reverse, but also pretty strong on the obverse.  PF68 Ultra Cameo

NGC 1977-S proof Jefferson nickel clashed dies obverse and reverse. The strongest clash marks are on the reverse, but the coin also has obvious clash marks on the obverse. PF67 Ultra Cameo

NGC Jefferson nickel proof type-2 planchet. The planchet is proof, which is generally a scarce planchet type on Jefferson nickels. Proof

Die adjustment strike, with the coin having been struck with insufficient striking pressure.