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Comments: This is the only use of Obverse P1 and the only use of Reverse 1840 PA in 1842. Reverse 1840 PA is the die used to strike almost all original proof issues from 1840 through 1854. |
Obverse P1 The photo below shows the Obverse P1 attribution grid.   1842 Obverse P1 attribution grid
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Reverse 1840 PA The reverse die used for the 1842 proof die marriage is the same die used for almost all original proof issues from 1840 through 1854. This die exhibits unique features on A3. The following picture shows these die markers, possibly created from die rust or just die crumbling due to imperfect die metal. These allow easy identification of the proof die, even on mishandled or lightly circulated examples.  1840 Reverse PA defects on A3
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| Photo credits:
Obverse P1: 1842 NGC PR65, ex. Norweb/Kaufman, from the Hertage archives. Reverse 1840 PA: 1846 PCGS PR58, from the Osburn-Cushing reference collection. |