GUATEMALA. Central American Union Pact Gold & Silver Medals (2 Pieces), 1890. Both NGC MS-63.Both pieces: Prober-350.1) Gold Medal. 32.30 gms. Some scattered marks and hairlines on the reverse, but presenting tremendous luster.2) Silver Medal. Muted steel gray surfaces with an underlying brilliance.Ex: John I. Walter Collection (acquired first quarter of the 20th century).