COLOMBIA. República de Colombia. 5 Pesos Oro, 10 Pesos Oro. March 22, 1938. P-341s, 342s. Specimens. PMG Superb Gem Uncirculated 67 EPQ.2 pieces in lot. A stunning pair of 1938 series Specimen notes with zero serial numbers. Gorgeous and perfectly matched. Much, much rarer than individual face and back proofs from the 1990 ABN sale.