<prompt> Bheka isiqephu esingezansi bese uphendula umbuzo ngemuva kwalokho ngolimi olufanayo nesiqephu: Isiqephu: Izinhlamvu zemali ezibizwa ngama-piastres nama-dong zakhishwa ngo-1953 zezwe laseVietnam, ezaba yiNingizimu Vietnam ngo-1954. NgoSepthemba 22, 1975, ngemuva kokuwa kweSaigon, imali yaseNingizimu Vietnam yaguqulwa yaba yi-liberation đồng ebiza ama-500 ama-dong aseNingizimu. Umbuzo: Yimuphi unyaka okhishwe ngawo i-dong?  <response>: Ngo-1953 