1888 Proof

The 1888 Seated Liberty Dime proof was struck in 832 pieces at Philadelphia, a small recovery from the 710-piece figure of 1887 and the start of a brief stabilization before the program's final two years pushed back below 700. Circulation output for the year reached 5,495,655 dimes from Philadelphia, with an additional 1,720,000 from San Francisco, both delivered into a Treasury demand that the bulk 1887 Philadelphia run had not fully met. The proof issue's modest climb against this circulation context reflects standing orders from the Mint Cabinet's collector base rather than any policy change in proof program administration: the Mint continued to fill subscriptions one tranche at a time through the year, with a final reconciliation against the official year-end delivery figure. The 1888 proof shows the Legend obverse with United States of America curving above Liberty's seated figure and the wreath reverse, both engraving heritages from Christian Gobrecht's 1837 design. Charles E. Barber served as Chief Engraver throughout the year and supervised die preparation for both the proof issue and the Philadelphia business strike.

Authentication of an 1888 proof relies on the standard close-collar diagnostics. A genuine example shows fully squared rims rising perpendicular to the field, the signature of multiple medal-press blows; field structure reads as watery and unbroken under a 10x loupe (a jeweler's magnifier), with controlled die-polish lines and no radial flow from the design. Denticles, the tooth-like beads at the rim's edge, appear sharp and complete on both sides. Cameo (the strong contrast between mirrored fields and frosted devices) and Deep Cameo designations are awarded by PCGS, the Professional Coin Grading Service, and NGC, the Numismatic Guaranty Company, on a portion of the surviving population. The cameo share for 1888 is smaller than for the early-1880s dates because late-1880s die preparation produced less aggressive device frosting, though early-strike pieces from fresh dies still show strong contrast and command premiums. Physical specifications must hold at 2.50 grams, 17.9 millimeters, .900 silver with a reeded edge.

For collectors, the 1888 proof falls in the middle of the late-1880s mintage cluster and trades accordingly. Population data shows several hundred certified examples across grades, with PR62 through PR64 the most populous band and gem PR65 and finer pieces scarce relative to demand. Pricing tracks the broader late-1880s proof market rather than the specific 832-piece mintage, and Cameo or Deep Cameo gem examples carry the strongest realized prices at major auctions. The Regular classification on this page follows site convention for proof entries; the modest mintage and late-series position are conveyed in the prose, not the badge. Counterfeit risk is low for 19th-century proofs, which require finish and rim work that modern cast or pressed counterfeits cannot replicate convincingly. For the broader story of Gobrecht's design, the 1892 Barber Dime transition, and the series' proof program, see the Seated Liberty Dime series history.