NGUYEN DYNASTY: Gia Long, 1802-1820, AR lang (38.41g), KM-180.1, 13x43x7mm, small character variety, in Hán Nôm characters, gia long nien tao ("made in the Gia Long era") // tinh ngan nhat lang ("pure silver one lang [liang]"), trung binh hieu ("made on the Trung Binh scale") on left edge and tri tien nhi quan bat mach ("monetary value of 2 ligatures 8/1-") on right edge, thin calligraphic style, VF-EF. This type was made with many different dies until the early 20th century as a popular form of bullion for use in Indochina.
Estimate: USD 100 - 150