2007-D Idaho, Satin Finish Proof

The 2007-D Idaho 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 inside every collector subscription. Don Everhart's reverse design centers a peregrine falcon against a silhouette of Idaho's geographic outline, with the state motto "Esto Perpetua" arched above the central composition. The design entered circulation on June 4, 2007, the third Western quarter of the year, and remains the only raptor-themed reverse in the entire fifty-state run. The peregrine had been federally delisted as an endangered species in 1999, and Idaho's nomination committee chose the bird in part to mark the recovery, a piece of context that adds a conservation thread to the satin example's collector value. Under the matte striking, the falcon's wing pattern and the state-outline frame read with a uniform low-luster sheen that no rotating cartwheel could reproduce.

Authentication rests first on surface texture. Genuine satin specimens show an even matte sheen across both the falcon and the open fields, the product of acid-etched or sandblasted dies rather than the mirror polish and frost-pickled devices that mark a San Francisco proof. There is no rotating cartwheel luster of the type that travels across a Denver business strike when tilted under a light, and no cameo contrast at the wing or talon. 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 production. The D mintmark sits above Washington's queue on the obverse; no S satin variants exist, since San Francisco struck only mirrored proofs in this era. Third-party graders use SP or SMS designations rather than PR. Per-mint mintage finished at 895,628 pieces for the 2007 set.

Because the coin never reached commerce, the as-struck Denver surface generally survives intact on examples pulled from sealed Mint Sets, and most certified pieces fall in the SP67 to SP69 range with SP70 examples common enough to hold top-pop premiums in check. For the full 2007 release run and Idaho's place within it, see the 50 State Quarters series history.