1968-S Lincoln Cent--Struck on a Dime Planchet--Proof-64 Cameo (NGC).2.25 grams. A rare wrong planchet error involving modern U.S. Mint Proof coinage. The cent design is well centered on the dime planchet, all devices sharply rendered with a frosty texture that contrasts markedly with deeply reflective fields. Bright and brilliant with outstanding visual appeal. Although the San Francisco Mint was engaged in striking both Proof and circulation strike cents in 1968, the facility struck only Proof dimes that year. This planchet was clearly intended for Proof dime coinage, finding its way by mistake into a cent press and producing this rare error. A lovely near-Gem that would do nicely in an advanced Mint error collection.