Watch List notes:

Potosi, Bolivia, cob 4 reales Royal (galano), 1727/6 Y, Louis I, extremely rare, NGC XF details / holed, finest and only example in NGC census, Calico Plate Coin, KM Plate Coin. Janson-R39.3.1; S-P43b; KM-RA35; Cal-33. 13.11 grams. Thick, small-diameter flan as expected (but larger than the Karon specimen, the only other example known), with no visible legends except (conveniently) the bottom of the king's ordinal PR, very deeply and evenly struck, well centered and also richly toned all over, with clear overdate below the cross, typically holed to left of pillars / about 4 o'clock on cross side. NGC #5903003-002. Plate Coin in Calico's Numismatica espanola (2019) and Krause-Mishler's Standard Catalog references, also pedigreed to the Ponterio auction of March 1996 (lot 1111).
($4000-6000)