AU Details (Holed) NGC KM533, Sch-409.1, large characters. Obv. Inscription, Tu Duc Thong Bao around central hole. Rev. Inscription, Tu My, with the four Perfections, around central hole 14.35g, 40mm. Pierced at 12 and 6 o'clock, for suspension, as are many Annamese coins. NGC has this piece listed as a 3 Tien on the holder, but we feel that it is a 4 Tien. Well struck for the issue.

Ex. Garrett Collection 1984, Lot 217 .

Heritage Auctions. 2016 December 8 - 9 HKINF World Coins & Ancient Coins Signature Auction - Hong Kong #3050