VIETNAM SOUTH 20 DONG 1964 AU PREFIX C4,STYLIZED FISH AT CENTER,DRAGONS WATERMARK,Lettering:Ngan-Hang Quoc-Gia Viet-Nam Hai o Đồng,Translation:National Bank of Vietnam Twenty Đồng,Reverse,Stylized fish at center,Watermark,Dragon's head,Printer,De La Rue (Thomas de la Rue, Thomas De La Rue & Co., TDLR), London, United Kingdom (1821-date)