1888 Proof

Proof Seated Liberty Quarter delivery for 1888 stood at 832 pieces, modestly above the 710-piece 1887 figure and inside the small-batch band that defines the final five years of the series. Philadelphia circulation production for 1888 ran at 10,001 business strikes, again leaving the Proof and the business strike within a roughly comparable order of magnitude. The 1888 also marked a return of San Francisco quarter production after a multi-year gap, with the 1888-S adding meaningful supply at the branch mint that year, but Philadelphia output stayed at the same minimal level that had defined the late-series stretch. The site mintage of 832 reflects the actual Proof delivery and is correct on the catalog page.

Strike characteristics and authentication diagnostics align with the late-series Proof template. Brilliant Proof striking shows mirrored fields, sharp denticles, and squared rims, with the eagle's shield lines, leg feathers, and the banner motto "IN GOD WE TRUST" all at full strike depth. Cameo contrast, the visual difference between frosted devices and reflective fields, earns a CAM designation from PCGS, the Professional Coin Grading Service, or NGC, the Numismatic Guaranty Company; heavier frost coverage on both sides earns Deep Cameo, written DCAM. CAM-designated 1888 Proofs appear at a moderate rate in major-service populations, and DCAM coins are scarcer than CAM but more available than on the lowest-mintage 1889 to 1891 years. Weight should sit near 6.25 grams under the Coinage Act of February 12, 1873 standard. Counterfeit risk stays low because the die-finishing process is difficult to replicate at certification quality.

Market position is steady and follows the late-series pattern. Combined PCGS and NGC certified Proof populations across all grades sit in the low to mid hundreds, in line with surrounding small-mintage years. The buyer base draws from Seated quarter Proof set builders, With Motto type collectors completing a Proof example, and date-run specialists working the 1875 to 1891 stretch. Because the 10,001 circulation strike for 1888 sits in Semi-Key territory at Philadelphia, the Proof often serves as the more available route to a high-grade 1888 quarter. CAM and DCAM designations carry premiums, original cabinet patina outprices rebrightened pieces, and certification through a major grading service is the working baseline. For the broader story of Gobrecht's design, the 1892 Barber Quarter transition, and the series' proof program, see the Seated Liberty Quarter series history.