Bolivia, Philip IV, 8-Reales, 16(??), Potosi, assayer O, 26.0 g., similar to preceding but (P) · O · · 8 · O vertically and stamped with type K countermark on reverse (Cal. 1031, 32, 34 var.; CN. 10; CT. 424-7 var.), striking crack, partially clear king's name, about very fine, countermark unevenly struck but clearly identifiable, good very fine and very rare