1910 Lincoln Cent. Proof-67 RB (PCGS). Delightful satin surfaces are fully struck with minimal iridescent olive-brown toning to otherwise dominant rose-orange mint color. The second date in the Proof Lincoln cent series, the 1910 is one of the more available of the pre-1936 issues. Even so, survivors that are as carefully preserved as the present example are rare and seldom offered in todays market.