2010-S Hot Springs, Silver Proof

The 2010-S Hot Springs Silver Proof opens the silver edition of the America's Beautiful National Parks program at San Francisco, the continuation of a silver-proof tradition that began with the 1992 standard Silver Proof Set and carried through the 1999-2008 State Quarters and 2009 Territories runs. Don Everhart's reverse, the Hot Springs headquarters with thermal water cascading across the foreground, sits on a 90% silver, 10% copper planchet at 6.25 grams, the .900 fine composition the U.S. Mint had used for silver proof quarters since 1992. The Mint reported 585,401 silver proof sets sold for 2010, the figure that fixes the print run on every one of the year's five silver quarters. Sets shipped at premium pricing separate from the parallel clad proof product line.

Authentication on the issue starts with the basic physical distinction between silver and clad. The coin weighs 6.25 grams, against 5.67 grams for the clad sister issue, the easiest non-destructive separation between the two products. The edge reads uniformly silver across the reeded perimeter, without the reddish copper-core line visible on a clad piece held at an angle. PCGS, the Professional Coin Grading Service, and NGC, the Numismatic Guaranty Company, label silver entries explicitly as Silver or S/Ag on the holder insert alongside the proof designation. Cameo (CAM) and Deep Cameo (DCAM) are the two contrast tiers, with DCAM the standard outcome on modern S-mint silver proofs because the dies are chemically frosted before each press run. Strike diagnostic points are the headquarters portico relief and the texture in the cascading thermal water.

The collector market positions the issue as a 2010 silver-set anchor rather than a standalone purchase. PR69-DCAM examples in NGC or PCGS holders trade for a modest premium over the bullion-spot value carried by the 0.1808 ounce silver weight, and PR70-DCAM examples sit a tier higher with registry-set buyers driving the spread. Silver proof set sales held above the half-million mark for 2010, a strength that softened across the following two years before the broader silver-pricing cycle reshaped the modern proof market. For the broader story of the ATB Silver Proof program and the series' production arc, see the Washington ATB series history.