Watch List notes:

Potosi, Bolivia, cob 8 reales Royal, 1666E. S-P37a; KM-R21; CT-430. 28.82 grams. Die match with Lazaro #177 (R3) with pillars date as "66", bold full XF+ details all over enhanced by toning against light gold surfaces from old gilding, tiny hole at top of pillars. Pedigreed to the Stack's Bowers and Ponterio auction of August 2013, with original lot-tag #12408.

Estimate: $5000-10000