Watch List notes:

Potosi, Bolivia, cob 4 reales, 1646V/T, extremely rare. S-P32; KM-17a; CT-727. 13.06 grams. Perfectly round and nicely toned, this is a "wonder coin" for collectors of Potosi cobs, as the assayer is full and bold and the date is all there (albeit doubled, in small digits), the shield and cross full (weak in centers) and well centered, VF for wear. By our records, the only other published example was in Sellschopp and sold for 1000 Swiss francs in 1988.
($1500-3000)