1871

A reported business-strike mintage of just 1,820 places the 1871 eagle among the very lowest production figures for the entire With Motto series and ranks it firmly within the top tier of Reconstruction-era Philadelphia Key Dates alongside the 1863, 1864, 1865, and 1869. Treasury demand for circulating eagles had collapsed in the post-war decade, and the Philadelphia Mint produced this denomination almost as an accommodation rather than for commercial release. Doug Winter has long flagged the 1871-P as one of the most undervalued dates in the series given how few examples exist relative to its tiny original output.

Authentication of a high-value date this scarce begins with the basics. Genuine pieces weigh 16.718 grams within a tight tolerance and carry a specific gravity near 17.2 consistent with the 90% gold, 10% copper alloy; a hydrostatic check is the fastest way to expose modern struck counterfeits or plated impostors that drift outside that range. Collectors should also verify that the mintmark area below the eagle is clean and unaltered, since the 1871 commands such a premium over common-date Philadelphia eagles that added-mintmark trickery would still pencil out for a fraudster. Repunched dates and specific die markers in the dentils have been catalogued by die-variety specialists and provide a useful confirmation when assessing borderline examples.

Survivors are widely estimated in the 30-to-60 range across all grades, with the typical encounter falling in Very Fine to Extremely Fine and showing the honest circulation wear expected of a working gold coin pulled from commerce. About Uncirculated examples are decidedly scarce and Mint State pieces are rare enough that a single fresh appearance can reset the auction record for the date. Demand is structural: every advanced With Motto eagle set has to account for 1871, and registry competition keeps the better certified survivors moving between specialists rather than sitting in dealer inventory. For broader context on type history and Reconstruction-era Philadelphia issues, see the Liberty Head Eagle series history.