Bolivia, Philip IV, 8-Reales, 1650, Potosi, assayer O, 23/2 g., similar to preceding but · P O 8 ( · O ·) vertically and stamped with type Y (?) countermark on reverse (Cal. 1032, 34 var.; CN. --; CT. 426, 7 var.), striking crack, coin erroded on obverse, good fine, partially clear countermark showing an elaborate crown, very fine, very rare