Watch List notes:

Costa Rica, copper-brass 10 centimos, 1920, GCR to right, PCGS MS63, finest known in PCGS census, ex-Whittier (stated on label). KM-152. 1.97 grams. Bold strike with lustrous surfaces under dull brass color (more copper than usual)+H1183, die-crack on date and die-erasure in blank area in legend at 7 o'clock on reverse. PCGS #34946906. Pedigreed to the Whittier collection.

Estimate: $125-200