Potosi, Bolivia, cob 2 reales, (162)3T with date as "ZIII," quadrants of cross transposed, extremely rare. 6.89 grams. Very bold full III of date (first specimen we have seen) outside of good full cross, the assayer to left of shield a bit harder to discern, mostly due to dark encrustation, probably AVF for actual wear.
Estimate: $300 - 450