Banco de Guatemala 50 Centavos de Quetzal 1958 intaglio printed proof on thicker cardboard, printer ABNC, P.35p without signatures and date, with border piece at upper margin and reverse stamped, very soft horizontal bend and a few minor creases at left border, Condition: XF+. (Image)

From 1915, 57 covers/mint and used stationery, foreign usages, to be examined. (Image)