COLOMBIA. Banco de la República de Colombia. 1 Peso Oro. July 20, 1923. P-361s. Specimen. P-361s. PMG Gem Uncirculated 66 EPQ.Superb condition bond paper Specimen note of this lowest denomination in the 1923 Kammerer series. There were only two face and back proofs sold by us in the first sale, with one of those pairs bringing over $1,000. This Specimen is more significant and valuable. Zero numbers and SPECIMEN in red.