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Comments: This die marriage is currently unknown, but since reverse 1856 PA was used in all years from 1856 through 1859 and also in 1861 we assume that it was also used in 1860. |
Obverse P1 The photo below shows the Obverse P1 attribution grid. Obverse P1 exhibits no significant die markers, but the date position should be adequate for definitive attribution. The only issue is separating the proofs from the business strikes which used the same die pair. That’s a judgment call.   1860 Obverse P1 attribution grid
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Reverse 1856 PA was used for all 1856 proofs. It was used again in 1857, 1858, 1859, and 1861. We guess that it was also used in 1860. This die exhibits only a few minor markers – lumps on S1 and L. Since most proofs seen are relatively high grade they are visible on most examples. The photos below show these features.  Reverse 1856 PA lump on S1  Reverse 1856 PA lumps on L The lumps on the L are usually the most visible marker.
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| Photo credits:
Obverse P1: 1860 PCGS PR55, from the Osburn-Cushing reference collection.
Reverse PA: 1860 PCGS PR62 CAC OGH, from the Heritage archives. |