Lot 37002. Annam, Minh Mang silver 7 Tiên Year 13 (1832). Estimate: $2,500 - $3,000. Photo Heritage Auctions.

AU58 NGC, KM194, Sch-181. Obv. Inscription (Minh Mang Thong Bao) around large sun. Rev. Large dragon with reign date 13 below. Superbly struck for the issue, with iridescent lead-gray patina, only a hint of wear, and no flaws worthy of mention. 

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