1829 Small Size Proof

The 1829 Small Size proof half eagle ranks among the rarest American gold proofs of the early federal era, with Bass-Dannreuther references suggesting only two to four pieces survive. The coin marks a structural turning point in the half eagle program. In mid-1829 William Kneass modified John Reich's Capped Head Left obverse to fit a reduced 23.8-millimeter planchet under the close-collar method, replacing the 25.0-millimeter open-collar format that had carried the design since 1813. A small handful of mirror-finish presentation pieces were prepared from the new reduced-diameter dies, almost certainly intended for diplomatic gifts or the Mint Cabinet rather than collector distribution. The site's combined-year mintage figure of 57,442 reflects business-strike output across both diameters and has no bearing on proof production, for which no separate Mint record exists at this date.

Authentication of an 1829 Small Size proof begins with calibrated calipers. A genuine Small Size measures approximately 23.8 millimeters across, while the early-1829 Large Size measures roughly 25.0 millimeters; that single gauge reading is the most decisive separator between the two sub-types and rules out later Capped Head proofs from the reduced-diameter era. Weight should fall at exactly 8.75 grams in 0.9167 fine gold with a reeded edge and a coin-aligned reverse rotated 180 degrees from the obverse. The proof finish itself shows fully mirrored fields against frosted devices, sharply squared rims that meet the field at a clean angle rather than rolling into it, and a subtle wire-edge effect along the periphery. Bass-Dannreuther proof-only die marriage attribution and PCGS or NGC encapsulation are essential at this rarity tier.

For modern collectors the 1829 Small Size proof exists almost entirely outside the open market. Surviving examples reside in advanced cabinets and institutional holdings, with the most prominent appearances in recent decades coming through the Pogue Collection sales conducted by Stack's Bowers between 2015 and 2017. When a piece does surface, prices climb into seven-figure territory. The 1829 Small Size circulation strike is itself among the scarcer dates in the half eagle run, with roughly 15 to 25 business strikes known in all grades; the proof variant sits well above that tier. Pre-1834 half eagles were melted in vast quantities once the world gold price moved above the U.S. coining ratio, and proofs from this transitional moment were particularly exposed. See the full Capped Bust Half Eagle series history.