COLOMBIA. Original Wash Drawing of Banco de la Republica Central Back Die and Die Proofs.8 pieces in lot. Original artist’s wash drawing on paper to develop central back die of Banco de la Republica 1926 onwards notes, using photograph of 1924 coin obverse. Also, artist’s model in same size on Bristol board with titles around. Two reduced sized models along with three die proof vignettes (one blue, two green). All with approvals and other official markings. Some mixed documents also (not in count). Tears or scuffing, average Fine or so. Important development for a major component of over 100,000,000 Colombia notes printed by the ABNCo.Mixed Uncertified Condition.From the Eldorado Collection of Colombian Paper Money.