Relatively little is known about William Kneass, the third individual to hold the post of chief engraver of the United States Mint. He served in this role from 1824 to 1840, though the last five years of his life saw him largely incapacitated by a stroke. In 1829, he adapted John Reich's design of the Capped Bust of Liberty and Heraldic Eagle to the half dime, a denomination which hadn't been struck since 1805. Fairly large numbers were produced beginning in 1829 and lasting until 1837, when this type was replaced by the Seated Liberty design of Christian Gobrecht. Though Capped Bust Half Dimes appear a bit congested by the many design elements, one can't help but admire the skill of the engravers who prepared their dies so skillfully.

By 1834, United States silver coins were circulating in meaningful numbers for the first time. While a fair sampling of Mint State examples survive, most of these are in the lower grades. This lovely gem is thus in the minority and represents outstanding quality. Its luster is bright and quite frosty. Both sides are moderately toned, the base color being a medium gray. Overlaying this is a delightful blend of amber, russet and aquamarine. Both dies retained the ghosts of a severe die-clashing. While of interest to the variety specialist, this phenomenon in no way diminishes the superb aesthetic value of this charming half dime.