1828 Proof

The 1828 proof half eagle belongs to the final year of the large-diameter Capped Head Left design, struck just months before William Kneass cut the planchet from 25 millimeters down to roughly 22.5 millimeters in 1829. Bass-Dannreuther census research suggests only two to four proof examples survive, all produced on special order rather than as part of any organized program. No formal proof mintage was recorded because Philadelphia kept no separate ledgers for presentation pieces this early, and the modest 28,029 figure shown for the year covers business strikes across both the normal date and the 1828/7 overdate cataloged on a separate page. Most pre-1834 half eagles met a brutal fate as the 0.9167 fine gold alloy made every coin worth more in metal than face, sending nearly the entire mintage into European bullion melts.

Authenticating an 1828 proof requires expert hands and certification by PCGS or NGC, since the gap between a sharply struck business strike and a true proof can be subtle on early gold. Every genuine example weighs 8.75 grams, measures the full pre-Kneass 25.0 millimeters across, and carries the standard 0.9167 fine gold composition with reeded edge and coin alignment. Two diagnostics carry the most weight. First, the fields should show full mirror reflectivity rather than the partial sheen of a prooflike business strike, with squared rims meeting the field at a clean angle. Second, look for fine die polish lines in the fields and complete strike on Liberty's hair curl and the eagle's wing feathers. Bass-Dannreuther die-marriage attribution helps confirm proof status, since proof dies were polished and prepared distinctly from circulation dies.

For modern collectors, the 1828 proof exists almost entirely outside the open market. Examples reside in major institutional holdings and a handful of advanced cabinets, surfacing only when great collections are dispersed at auction. When one does appear, it commands prices well into seven figures and draws attention from every serious early gold specialist. Pursuing this coin sits beyond the reach of nearly all collectors, but understanding its place in the chronology illuminates how thinly populated the proof rolls were before the 1850s, and how dramatically the Kneass diameter reduction one year later closed the chapter on the Reich design. See the full Capped Bust Half Eagle series history.