Une monnaie en bronze de l'empereur Nguyen Phuc Giao (1919-1840), ère Minh Mang (1820-1840) émise en 1820.
A/ Minh Mang thong bao (Monnaie courante de l'ère Minh Mang)
R/ Grande prospérité
Poids : 14.2 g. Diamètre : 42.5 mm
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