Portugal, silver - Maria II, crowned shield countermark (870 Réis) on Spanish 20 Reales of Fernando VII, 1822, Madrid mint, engravers S and R (José Sánchez Delgado and Isidoro Ramos del Manzano). Gomes M2 30.01. Rare combination of host coin and countermark. Very well applied mark, that did not damage the host coin's reverse, which kept part of its original luster. Rare combination. Countermark EF, host coin EF. Estimate: € 580-630