Watch List notes:

Central American States, proof 20 pesos medallic coinage, 1971, 20th anniversary of ODECA, ex-Richard Stuart. KM-X14. 7.96 grams. Undamaged Proof with frosty details and mirror fields, copper-gold color, hallmarked "0.900" (90% fine, 0.2315 oz AGW). Pedigreed to the Richard Stuart collection. (Estimate: $300 - 450)