Watch List notes:

Potosi, Bolivia, cob 2 reales, 1656+57E, extremely rare. S-P37a; KM-unl (16 for type); CT-unl. 6.92 grams. Choice full pillars (bold) with clear date 56 while the date below the full cross is clearly 57 (first example we have ever seen or heard of), oblong flan with light toning, AXF.

Estimate: $200-400