MS62+ PCGS, KM456.1, Sch-349.2. Even though PCGS has listed this piece as SCH-349.2 (round faced Dragon), this piece obviously has the narrow faced dragon and we feel that it is Sch-349.1. Obv. Central hole with eight characters around (Tu Duc Thong Bao Trieu Dan Lai Chi). Rev. Dragon, with head above hole, and tail below, with stylized clouds on right and left. A fabulous example of this type, with sharply struck devices and lustrous silver-gray patina. Rare in this exceptional condition.

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