1829 Proof

The 1829 Proof Capped Bust Dime captures the first full year of the reduced Small Type diameter struck in proof format, and the result is one of the rarest specimen pieces in the entire early federal silver lineage. After several years of slowly retiring the older 18.8 millimeter design, the Philadelphia Mint settled on a tighter 18.5 millimeter planchet for 1829, paired with a fresh hub configuration and a cleaner layout of stars and lettering. A handful of proofs were struck from polished dies on carefully prepared planchets, almost certainly intended as presentation pieces for visiting dignitaries, mint officers, and a small circle of early numismatists. No production ledger survives, but population data from the major grading services and decades of auction tracking suggest fewer than fifteen examples exist today across all grades, placing the issue at roughly R.7 to R.8 on the Sheldon rarity scale. When one surfaces, it tends to do so quietly, often from an old cabinet, and recent appearances have settled in the mid to high five figures.

Authentication begins with the basics and quickly turns technical. A genuine 1829 proof should measure 18.5 millimeters in diameter and weigh 2.7 grams, struck in the standard .8924 fine silver alloy with a reeded edge produced by the Castaing machine before striking. The fields must show the deep, watery reflectivity that comes only from double striking on burnished planchets, and the rims should appear squared and sharp rather than rounded as on business strikes. Cameo frost, where the devices contrast against the mirror fields, is usually softer on this issue than on later proofs because die polishing technique was still maturing, but the contrast should still be visible under angled light. Look for crisp star centers, fully struck dentils, and zero flow lines in the fields. Any proof candidate without a major grading service slab designating it as PR or Proof should be treated with deep skepticism, since several heavily polished circulation strikes have been offered over the years as proof contenders and rejected. The John Reich initials JR below the truncation of the bust should remain razor sharp.

For collectors building a date-and-variety set of early dimes, this issue is the apex of difficulty and is rarely confused with the more available business strikes of the same year. To see how the proof program developed alongside the circulating coinage, see the Capped Bust Dime series history.