Lot of 6 Potosi, Bolivia, cob 4 reales, Philip III and IV, various assayers (where visible). 73.66 grams total. Interesting lot with a range of weights and sizes, one (from the 1640s) darkly debased and weighing only 7.34 grams(!), one with edge-split, one polished and one with a hole, Fine on average.
Estimate: $250 - 375