Watch List notes:

Lot of two medals (one each in gold and silver) for the First International Convention of Historians and Numismatists held in Potosi, Bolivia, in October 2016. 30.83 and 31.20 grams, respectively, each 35mm. Gold (22K) and silver medals struck in Argentina (very rare, as only eight made in gold, 80 in silver), the silver twice the thickness of the gold (but around the same weight), showing the city and mountain of Potosi on obverse and double globes (with monogram MZ for engraver Miguel Zamparella to left) below the name of the convention on reverse, both in lustrous Mint State (the silver somewhat prooflike). The gold has a struck-through-grease error to right of center on the obverse, presumably a trait of all the known examples, but the silver is fully struck-up. This is the first time a set of these medals has been offered at auction.
($1500-3000)