NGC 5c 1977-S Proof Jefferson Nickel Clashed Dies Proof

NGC 1977-S proof Jefferson nickel with strong clashed die reverse and more moderate (but still strong) clashed die obverse.

Proof dies are very scarce with strong die clashes, since the dies are quickly repaired or retired when they develop die clashes. 

Clashed dies occur when there is no planchet between the dies, resulting in the two dies clashing together and transferring some of their design to the opposing die. 

Proof details with some small gouges around the word "Monticello."