1842 Small Date, Reverse of 1842 Proof

Only seven 1842 Small Date, Reverse of 1842 Proof Seated Liberty Half Dollars have been confirmed in numismatic literature, and two of those reside permanently in the Smithsonian Institution and the American Numismatic Society. Five remain in private hands. No master delivery record survives, so the survivor count itself is the working census, placing the issue in the R-7 to R-8 Sheldon rarity band. This combination is also the only documented proof pairing for an 1842 Philadelphia half dollar. The Small Date with Reverse of 1839 transitional and the Medium Date issue both circulated heavily as business strikes, but neither is known in proof format from any major reference or institutional collection.

Authentication begins with subtype confirmation because the format is so concentrated. The obverse must show the Small Date logotype, with shorter, lighter numerals and a 4 ending in a plain square crossbar rather than the crosslet end of the Medium Date hub introduced midyear. The reverse must show the Medium Letters of the Reverse of 1842 hub, where UNITED STATES OF AMERICA and HALF DOL. appear in the heavier, more spread-out punches that replaced the earlier Reverse of 1839. Pair Small Date with Medium Letters and the attribution is correct. Beyond subtype, proof diagnostics demand mirror fields with the squared rims of multiple-blow striking, fully struck stars and head detail without business-strike softness, and a wire rim or partial wire rim on at least one side. Surfaces read as intentional polish rather than the looser flow lines of a prooflike business strike. Any uncertified candidate at this rarity level requires expert review.

Realistically, no working collector builds a set around this piece. It belongs to specialist cabinets and museum collections, and when one trades it does so at five-figure levels with provenance attached to named cabinets such as the F.C.C. Boyd "World's Greatest Collection." The site mintage figure of 2,012,764 reflects the combined 1842 Philadelphia business-strike delivery and does not describe proof production. For hub transitions, proof production at the Mother Mint, and the broader chronology of the type, see the Seated Liberty Half Dollar series history.