1870 Proof

The 1870 Seated Liberty Dollar Proof is struck at the Philadelphia Mint with a documented mintage of 1,000 pieces per the Mint Director annual report. The 1,000-piece figure marks a sharp increase from the 600-piece 1868-1869 figures and reflects expanded collector subscription demand at the start of the Carson City Mint era. The 1870 Proof carries the standard Christian Gobrecht obverse and the With Motto reverse that defines the Type 2 era from 1866 through 1873. The live page mintage of 416,000 reflects the circulation-strike figure rather than the proof mintage.

Authentication of an 1870 Seated Dollar Proof requires careful examination of strike quality, mirrored field character, and surface preservation under five to ten power magnification. The 1870 Proof shows fully struck Liberty drapery, sharp eagle feather definition with the motto banner clearly defined, and deep mirror fields that distinguish formal proof production from business-strike prooflike examples. PCGS, the Professional Coin Grading Service, and NGC apply standard proof grading conventions across the Seated Dollar proof sequence. Cameo and Deep Cameo designations are uncommon for 1870 Proof examples.

The 1870 Seated Dollar Proof is a regular-classification proof entry on this site under the standard catalog convention for Seated Dollar proofs, with the 1,000-piece mintage and standard proof status reflected in the prose rather than the badge tier. The 1870 Proof pairs with the broader 1866 Motto through 1873 With Motto P-mint proof sequence as the matched Type 2 proof era, distinct from the legendary 1870-S circulation-strike rarity catalogued separately. Auction records for confirmed 1870 Proof examples cluster in four-figure prices for Proof-63 and Proof-64 grades, with Cameo premiums applying at higher grade levels. Specialist Seated Dollar proof collectors typically target the complete 1840-1873 P-mint proof run by year, with the No Motto / With Motto type-transition pair and the restrike issues forming key sub-collecting milestones within the broader proof set assembly project. For the Type 2 Seated Dollar proof production context, see the Seated Liberty Dollar series history.