1920 CHINA Toned Yunnan Silver 50 Cents NGC AU. The item "1920 CHINA Toned Yunnan Silver 50 Cents NGC AU" is in sale since Sunday, May 9, 2021. This item is in the category "Coins & Paper Money\Coins\ World\Asia\China\Empire (up to 1948)". The seller is "prodigycoins" and is located in Bellevue, Washington. This item can be shipped worldwide.