Watch List notes:

Mexico City, Mexico, cob 1/2 real Royal, 1722/0J, rare, NGC VF details / holed, ex-Rudman (stated on label). S-M22; KM-unl (R24 for Type); CT-unl (cf. 1810). 1.34 grams. Richly rainbow toned with full details, crude hole at top. Pedigreed to the Isaac Rudman collection.

Estimate: $600-900