2016-S Harpers Ferry Proof

San Francisco struck 1,093,510 pieces of the 2016-S Harpers Ferry clad proof, the figure matching the U.S. Mint Clad Proof Set sales total because the five 2016 quarters shipped as a packaged product. Thomas Cleveland's reverse renders the engine house at Harpers Ferry, the small brick fire-engine building where John Brown and his raiders made their final stand during the October 1859 raid on the federal armory at the confluence of the Potomac and Shenandoah rivers. The composition keeps the engine house in the center of the field with the rolling West Virginia hills rising behind it; the structure later became known as John Brown's Fort. The issue is the fourth of five 2016 releases.

Proof finish on the issue is the standard San Francisco style: mirrored fields struck from polished planchets against dies frosted in chemical baths before each press run. Cameo (CAM) and Deep Cameo (DCAM) are the contrast designations PCGS, the Professional Coin Grading Service, and NGC, the Numismatic Guaranty Company, apply on top of the numeric grade, with DCAM the default outcome rather than an upgrade tier. Grade distribution clusters at PR69-DCAM and PR70-DCAM with population counts in the thousands at the top. The diagnostic strike areas are the engine house's brickwork pattern (which carries fine repeating relief that flattens visibly under weak press pressure) and the roofline detail at the building's gable end. The clad composition (75% copper-nickel over a pure copper core, 5.67 grams, 24.26 mm) matches every Washington quarter struck since 1965, so counterfeit risk is essentially nil at the issue's price point.

The issue trades at the upper end of the lower price band among 2016 ATB proofs because the antebellum subject draws cross-disciplinary interest from Civil War, abolitionist-history, and West Virginia state collectors. A raw certified PR69-DCAM example moves for a small premium over the cost of breaking up a sealed 2016 Clad Proof Set, and PR70-DCAM examples in NGC or PCGS holders sit at a modestly higher tier. Harpers Ferry's historical resonance, from the 1859 raid through the town's transfer with West Virginia statehood in 1863 to its present National Historical Park status, gives the design distinctive collecting appeal among the year's five releases. For the broader story of the ATB proof program and the series' production arc, see the Washington ATB series history.