2007-P Washington, Satin Finish Proof

Washington State's quarter entered circulation on April 2, 2007, the second of five Western designs released that year and the only one to draw its imagery from both the Pacific shoreline and the Cascade Range. The 2007-P Washington Satin Finish Proof was struck at the Philadelphia Mint exclusively for the U.S. Mint's Annual Uncirculated Coin Set, the satin format's third year as the centerpiece of that collector product. Charles L. Vickers' reverse pairs a leaping king salmon with Mount Rainier rising in the distance, the state legend "The Evergreen State" arched above and "1889", the statehood year, anchoring the lower field. The salmon's airborne curve, scaled with detailed fin and gill work, and Rainier's snow-capped summit gave Vickers two of the program's strongest texture contrasts, and the satin treatment unified them into a single low-luster plane that ordinary rotating cartwheel could not match. Annual mintage settled at 895,628 pieces per mint, the standard 2007 set distribution.

Authentication rests on surface character first. Genuine satin coins present an even matte sheen across both Rainier's slope and the salmon's body, with no mirror finish under the gill detail and no cartwheel rotation across the fields when tilted under a light. The uniformity comes from specially treated dies, typically acid-etched or sandblasted, rather than from the mirror polish and frost-pickled devices that define a San Francisco proof. Composition is standard cupronickel-clad, 91.67% copper / 8.33% nickel by total weight, with the outer layer running 75/25 over a pure copper core, at 5.67 grams and 24.3 millimeters, matching the circulation production exactly. The P mintmark sits above Washington's queue on the obverse; no S satin variants exist, since San Francisco struck only mirrored proofs that year. PCGS and NGC slab these as SP or SMS rather than PR.

Because every satin example was sealed inside Mint Set packaging from day one, the as-struck surface survives intact on most examples, and certified pieces cluster in the SP67 to SP69 range with SP70s common. For the wider 2007 Western run and the program's design arc, see the 50 State Quarters series history.