正面: Old screw type coining press divides weight and silver purity "12 / ONZAS / PLATA / PURA" and mintmark "Mº", date and purity "1987 / LEY 999", issuer "CASA DE MONEDA DE MEXICO"
背面: Franklin, Washington and Jefferson seated at table, theme "THE CONSTITUTION OF THE U.S.A. 1787-1987 200ᴛʜ ANNIVERSARY"
