1870

Philadelphia delivered 471,500 business-strike dimes in 1870, a modest step up from the 256,600 figure of the prior year and the largest parent-mint dime delivery since the wartime collapse of 1862. The year also marked the opening of the Carson City Mint in February 1870, which began with a Seated Liberty silver dollar from Coin Press No. 1 and followed within days with the first $20 gold double eagle, but did not yet add a dime to its production schedule, leaving the parent mint and San Francisco as the only sources of new Seated dimes in calendar 1870. The economic backdrop continued to work through the long aftermath of the December 30, 1861 specie suspension, with greenbacks carrying eastern commerce and hard silver moving at a premium against paper, and the 1870 occupies a recovery position in the Reconstruction sequence rather than a numismatic landmark.

Strike on the 1870 follows standard Philadelphia practice for the Legend obverse subtype, with the central devices typically well brought up on the wreath reverse and the recurring softness when present gathering on the upper-obverse legend where UNITED STATES OF AMERICA arches above Liberty. The Legend obverse format opened in 1860 replaced the thirteen stars Gobrecht's original design had carried since the late 1830s, and the dime continued without an IN GOD WE TRUST motto because the planchet was too small to accept the ribbon banner that arrived on the larger silver denominations in 1866. Authentication rests on the 2.49-gram weight under the Coinage Act of February 21, 1853, a 17.9-millimeter reeded planchet, the Legend obverse, and the plain wreath reverse with no mintmark. PCGS and NGC populations show broad coverage through circulated grades and supportable Mint State availability, with the price ladder remaining shallow through About Uncirculated.

The 1870 trades as a regular-issue parent-mint date suited to date-set acquisition at modest certified pricing, with the steepest premiums reserved for choice gem Mint State examples carrying full strike and original surfaces. Raw circulated pieces are broadly safe given the parent-mint origin and require only basic weight and diameter checks. For the broader story of Gobrecht's design, the Civil War-era production, and the Carson City Mint, see the Seated Liberty Dime series history.