2007-D Wyoming, Satin Finish Proof

The 2007-D Wyoming Satin Finish Proof was the Denver Mint's contribution to that year's Annual Uncirculated Coin Set, paired one-for-one with the Philadelphia issue across every collector subscription. Norman E. Nemeth's reverse renders Wyoming's Bucking Horse and Rider in mid-jump, the state's officially registered trademark since 1936, with the rider arched back at the saddle and arm raised, the state motto "The Equality State" arched above and the statehood year "1890" anchoring the lower field. The design entered circulation on September 4, 2007, the fourth Western quarter of the year, and its simplified silhouette treatment was an inspired pick for the program: the matte striking that defines the satin format picks up the horse's muscle lines and the rider's hat brim without the bright highlights that a mirror proof imposes on identical relief. Per-mint mintage finished at 895,628 pieces for the 2007 set, the standard distribution.

Authentication begins at the surface. Genuine satin specimens show a uniform matte sheen across both the horse-and-rider silhouette and the surrounding fields, the result of acid-etched or sandblasted dies rather than the mirror polish and frost-pickled devices used at San Francisco. There is no rotating cartwheel luster of the type that travels across a Denver business strike when tilted, and no mirror-and-cameo contrast at the rider's edge. Composition is standard cupronickel-clad, 91.67% copper / 8.33% nickel by total weight, with a 75/25 outer cladding over a pure copper core, at 5.67 grams and 24.3 millimeters, identical to the circulation specification. The D mintmark sits above Washington's queue on the obverse; no S satin variants exist, since San Francisco produced only mirrored proofs in this era. Third-party graders use SP or SMS designations rather than PR, a label distinction worth checking when sourcing certified holders.

Because the coin never reached commerce, the as-struck Denver surface generally survives intact on examples recovered from sealed Mint Set packaging, and most certified pieces fall in the SP67 to SP69 range with SP70s plentiful enough to keep top-pop premiums in check. For the 2007 release run and Nemeth's broader statehood credits, see the 50 State Quarters series history.