CENTRAL AMERICA 4 Coins 2002 Silver Proof Set Lenin Marx Engels Mao Tsetung. 4 coins in silver proof grade, 38mm in diameter each. KM784, KM785, KM786, KM787. Low mintage of 2,000 sets only. The free listing tool. The item “CENTRAL AMERICA 4 Coins 2002 Silver Proof Set Lenin Marx Engels Mao Tsetung” is in sale since Wednesday, February 19, 2014. This item is in the category “Coins & Paper Money\Coins\ World\North & Central America\Other North & Central Am Coins”. The seller is “chinacoin” and is located in YAN TAI. This item can be shipped worldwide.