2018-S Silver Reverse Proof Set US Mint With Box COA OGP 10 Coin. Mint 10 coin Silver Proof Set contains a Native American dollar, Kennedy half dollar, Roosevelt dime, Jefferson nickel and Lincoln cent, along with all five National Park quarters. All coins bear the San Francisco “S” mint mark, and feature extra sharp images and mirror-like surfaces. The half dollar, quarters and dime are all 90% silver. Comes with the original U. Mint packaging, including a certificate of authenticity. At times, items may tone due to the natural oxidation process that has no adverse effect on their value. If this listing has the Best Offer option, then we are willing to listen. If there is no “Make Offer” option, then this is our best price. Enuff_Stuff Gold and Silver. Reserves the right to refuse or cancel any order reviewed by our Compliance Team, which are deemed questionable or have increasing potential risk for being fraudulent. If you need to change the address you need to Cancel your order and place a new order using the correct address. I test all of bullion items with Sigma Precious Metal Verifier. Any grade indicated is our best judgment, unless it has been graded by a third-party grading service. We are NOW Offering. This is NOT the actual item you will be receiving. Photos in this listing may or may not be stock photos. The photos are meant to be an indication of the product you will receive. Member In Good Standing of the following Groups. NGC – the Numismatic Guaranty Corporation. PCGS – the Professional Coin Grading Service. ANA – the American Numismatic Association. I do make mistakes, if you see a mistake, please let me know! I would never intentionally list something incorrectly or misleading.