1830 Large 5D

The 1830 Philadelphia issue of the Capped Head Left Half Eagle was struck on the new reduced-diameter Kneass planchet introduced the year before, and it carries a combined recorded mintage of roughly 126,351 pieces across all dies used that year. Specialists divide this single date into three cataloged variants: a normal pairing, a Large 5D, and a Small 5D, with the difference resting entirely on the size of the "5 D." denomination logotype punched into the reverse die. The Large 5D entry on this page captures the marriage in which the engraver used the bigger, bolder denomination punch, producing numerals that sit taller and broader across the lower reverse field than they do on the matching Small 5D variety. Both 5D sizes circulated together, but modern collectors track them as distinct die marriages because the reverse logotype is a clear, repeatable diagnostic.

Variety attribution begins with a magnified look at the reverse "5 D." just below the eagle. On the Large 5D the numeral and letter are noticeably wider and heavier in stroke than on the Small 5D, with more open interior loops on the figure 5 and a thicker D. Authentication of the host coin itself rests on the standard Capped Head specifications: a weight of 8.75 grams, a diameter of 23.8 mm on the post-1829 reduced planchet, and a fineness of 0.9167 fine gold with the balance in copper and silver, all on a reeded edge. Worn examples noticeably under target weight, with a wider planchet closer to the older 25 mm format, or with soft denomination numerals from a struck copy should be sent to a major grading service.

For collectors today the 1830 Large 5D appeals on two levels at once. It is a date from a short, low-mintage early gold series that ran from 1829 through 1834 in this reduced-diameter format, and it carries an additional layer of die-marriage interest for specialists who care about how the early Mint prepared its reverse punches. The Large 5D is the more frequently encountered of the two 5D varieties for the year, but every grade is genuinely scarce and high-grade survivors are heavily sought. Build context for this issue by reading the full Capped Bust Half Eagle series history.