Mongolia 1971 Copper-Nickel Tugrik. Commemorative issue on 50-th Anniversary of the Revolution. KM-34a. Graded by NGC as Superb GEM Brilliant Uncirculated NGC MS-67. Finest ever graded by two grades. Not cleaned nor dipped, all natural with light natural toning over smooth mark free fields. Those copper-nickel coins are scarce since most of the mintage was made in Aluminum-Bronze. However, those copper-nickel coins that available are usually in lower grades, scratched/cleaned/dipped and otherwise messed with. Finding a decent Copper- Nickel coin of this type is a challenge, but MS-67 makes it a rare coin indeed. NGC population 1/0.