COLOMBIA. Duo of Gilt Bronze Uniface 20 Pesos Essais (Patterns) (2 Pieces), 1873. Paris Mint. Both PCGS Certified. Plain edge. By A. Barre.<p>1) Obverse Trial. PCGS SPECIMEN-63. KM-TS11; Restrepo-78.<p>2) Reverse Trial. PCGS SPECIMEN-66. KM-TS12; Restrepo-78.<p>This matching pair presents the immensely alluring and attractive design with intense golden-yellow color and shimmering brilliance abounding throughout.