Proof 1937 10c. olive-green (Leon Cathedral), cut-down die proof in dark green on India, die sunk on small card, stapled to an imperforate plate proof sheet of 200 stamps on thick card, arranged in two panes of 100, printed in dark green (poor impressions) and annotated in upper margin "79698 Trans. 200/10 Centavo Stamp Plate A2/Die O.K. 5/11/33 [initialled]", folded horizontally through interpanneau margin and vertically through fifth row of stamps. Also an imperforate plate proof sheet of 200 stamps as issued with "A.B.N.CO." security puncture, folded horizontally and vertically and accompanied by various American Bank Note Company worksheets.