China (Republic), Hunan Province. Brass 20 Cash Coin. Mint Year: 1919 Denomination: 20 Cash Region: Hunan Province Reference: KM-Y#400.7b. Material: Brass Hunan is a province of the People’s Republic of China, located in the middle reaches of the Yangtze watershed in South Central China; it borders the province-level divisions of Hubei to the north, Jiangxi to the east, Guangdong and Guan ...