1906 Liberty Nickel. Proof-67 Cameo (PCGS). CAC.;Lovely Superb Cameo Proof quality from a mintage of 1,725 pieces. Both sides are fully struck with bold field to device contrast, but whereas the obverse is untoned the reverse exhibits splashes of pretty pinkish-russet iridescence. An impressive strike and condition rarity that is worthy of the strongest bid.