These coins have a natural purple patina toning as photos. Welcome to my store world coins paradise. We are professional coin dealer and sell world coins over 20 years. All my coins are genuine guaranteed.If unsatisfied with item for any reason, return by" as received" condition within 14 days of receipt. The item "Korea-South 1970 Complete Set of 6 Silver Coins Proof set" is in sale since Monday, December 3, 2018. This item is in the category "Coins & Paper Money\Coins\ World\Asia\Korea\South Korea (1948-Now)". The seller is "forever223" and is located in Shanghai. This item can be shipped worldwide.