Potosi, Bolivia, cob 4 reales, 1747 q, Ferdinand VI. S-P50a; KM-unl (39 for type); Cal-398. 13.42 grams. Chunky flan with good full cross (albeit off-center) and nearly full pillars, two dates and three mintmarks, trace of -DVS of king's name in legend, darkly toned XF+.
Estimate: 250 - 375 USD