Watch List notes:

Santiago, Chile, 20 centavos, 1874, REPUDLICA error, NGC MS 62, finest and only example in NGC census. KM-unl (138.1 for type). Choice luster, no toning but a couple carbon spots, rare and shocking error with clear D/B in legend (first we have seen). NGC #4742616-001.

Estimate: $300-450