1830 Small 5D

The 1830 Small 5D half eagle belongs to the second year of the Capped Head Left, reduced-diameter design that William Kneass introduced in 1829. The Philadelphia Mint struck 126,351 half eagles dated 1830, and three known die marriages divide that combined total. Two marriages share a reverse hub featuring a noticeably larger "5 D." denomination logotype, while the third uses the smaller "5 D." punch that defines the variety covered here. The Small 5D is the scarcer of the two reverse styles, and specialists have tracked it as a distinct die pairing since the earliest catalogs of the series. Almost every survivor was melted under the 1834 Coinage Act once the gold in the old standard exceeded face value, which is why any 1830 half eagle of either reverse is a five-figure coin in collector grades today.

Authenticating the variety starts at the reverse denomination. Compare the height of the numeral 5 against the eagle's tail feathers and the period after the D. On a genuine Small 5D, the numeral sits visibly shorter and the punch impression is narrower, with the period set tight to the D rather than well separated. Confirm specifications next. The post-Kneass Capped Head planchet weighs 8.75 grams at 0.9167 fine gold, and the diameter is 23.8 millimeters, not the 25 millimeters carried by earlier Capped Bust strikings before the 1829 redesign. A coin that measures noticeably wider or weighs above tolerance is almost certainly a problem piece, since period counterfeiters worked from the older planchet standard and rarely matched the new diameter.

Modern demand for the Small 5D comes from Capped Head specialists assembling a die-marriage set and from type collectors who want a documented variety rather than the more frequently offered Large 5D. PCGS and NGC both attribute the Small 5D on holders, and a CAC sticker materially affects realized prices given how often these early gold pieces show old cleaning. Population reports suggest fewer than a few hundred coins survive across all grades for this reverse, with most examples concentrated in VF through low AU. Choice AU and Mint State coins are major auction events. Compare any candidate against signed plate coins in the standard Capped Head references, and study the larger Capped Bust Half Eagle series history.