The 2005 S Silver Proof Oregon State Quarter is a highly sought-after coin made of 90% silver. Minted in San Francisco, this coin features a proof strike type and comes as a single coin in its uncirculated state. Part of the State Quarters series, this 25 cent coin showcases the unique design of Oregon on the reverse, making it a valuable addition to any coin collection. With its high silver content and pristine proof finish, this coin is sure to be a prized possession for any coin enthusiast.