Mirriam's Lincoln design for 1868. This is not believed to be a mint product. A similar design by him was created in 1866 JC1866-1/P5080.
This design also exists in the following combinations:
Gold with reeded edge JC1868-1/P5105 with only 3 or so known with the obverse die cracked as illustrated below.
Nickel with reeded edge JC1868-2/P5110 is unconfirmed. It may be a misdescription of JC1866-6/P5101.
Nickel with plain edge JC1868-3/P5115 is possibly unique and is ex B/M 11/89, Kagin's 9/17 and is illustrated above. Click on the thumbnail image to see an enlargement.
Lead with reeded edge JC1868-4/P5120 is also believed to be unique and is also ex B/M 11/89, Kagin's 9/17 to Saul Teichman. It appears to be a true test piece, on a thick planchet. As the obverse die is not cracked, it is likely the first piece struck from the die. It is also doublestruck with the 1868 date incused and reversed at 3:00, 6:00 and 9:00 as if a date punch was applied to the coin after striking. It appears to be the same example noted by Taxay as ex Merkin stock in his 1976 Catalog and Encyclopedia of US Coins and is illustrated below.
Incomplete reverse die trials P3302 & P3305 are also known. These are listed by Pollock as splashers for 3 cent pieces.
Photos courtesy of Kagins.