Complete 2017, 2018, & 2019 10-Coin U. Mint Silver Proof Sets OGP Box COA. This listing is for a complete 2017, 2018, and 2019 10-Coin U. Mint Silver Proof Sets. Packaging is excellent and coins are gem proof. Items sent to US addresses generally arrive in a week or less, items sent internationally usually arrive in 2 weeks or less. Please allow adequate time for your item to arrive.