2003-S Maine, Silver Proof

The 2003-S Maine Silver Proof Quarter honors the twenty-third state admitted to the Union and gives the deluxe-set treatment to a design that pairs two of New England's most enduring nautical icons. The reverse centers Pemaquid Point Lighthouse, commissioned in 1827 to mark the rocky entrance to Muscongus and John Bays on the central Maine coast, with the keeper's house tucked at the base of the tower and the granite ledges of the headland angling into the foreground. A three-masted schooner, the Victory Chimes, sails the offshore waters at right, for decades the largest commercial sailing vessel under the American flag and one of the last fragments of the Maine windjammer fleet. The legend curves above and the design carries no banner, letting the lighthouse and schooner carry the state's identity by themselves. On the silver proof, the granite striations, the lighthouse's window frames, the schooner's rigging lines, and the wave detail along the ledge edge frost with a depth clad proofs cannot reach.

San Francisco struck 1,125,755 silver proofs of the Maine quarter, the standard mintage across every 2003 silver proof state issue, and authentication starts with composition. The coin is 90% silver and 10% copper, the silver proof standard the Mint maintained from 1992 through 2018 before switching to 99.9% pure silver in 2019. Weight is the single most efficient diagnostic at 6.25 grams against 5.67 grams for clad proofs, a difference any modern jeweler's scale resolves on the first reading. Diameter is unchanged at 24.3mm versus the clad version, so calipers alone will not separate the two formats. Surfaces should read silvery-white and reflective rather than the warmer copper-nickel tone, with squared rims from proof striking pressure, deeply mirrored fields, and frosted devices on Cameo and Deep Cameo grades. The lighthouse tower and schooner rigging anchor the contrast on this issue, and DCAM examples with full granite-ledge and rigging frost remain the format set builders specifically chase.

For the program's full arc, structure, and collecting framework, see the 50 State Quarters series history.