Watch List notes:

Potosi, Bolivia, cob 1/2 real, Philip IV, crossed-monogram design (1652), king's ordinal IIII visible in cross-side legend. S-P37; KM-unl; CT-unl. 0.96 gram. Deeply toned VF+ with full monogram/cross and cross, the former with four dots and king's ordinal IIII in cross-side legend, which the new Mastalir reference shows identifies as being from the 1652 transition as opposed to 1656 (the latter having the king's name and ordinal on the monogram side instead). Pedigreed to our Auction #12, lot #1156. ($200-300)