COLOMBIA. Banco de Colombia. 50 Pesos, 100 Pesos, December 15, 1881. P-S387p, 388p. Face and Back Proof Pairs.4 pieces in lot. Complete 1881 denomination set of this magnificent series of proofs engraved and printed by the American Bank Note Co. Both are lovely types and superb condition India paper proofs on wide margined cards. The 50 Pesos face is light orange with Andean mountain scene. The 100 Pesos face is slightly deeper orange with Columbus landing at the center. The backs are brown and orange respectively. All Gem Uncirculated 66 EPQ except the 100 Pesos face is Gem Uncirculated 65 EPQ. All are evenly matched, pristine examples. Quintessential Colombian proofs from the 1990 ABN sale.