Lot 40200 – 1876, 500r orange, the upper left corner-sheet block of four mint

1876, 500r orange, the upper left corner-sheet block of four, with enormous margins exhibiting ABN « Compañía Americana de B… » & « …etes de Banco Nueva York » imprints in Spanish, full fresh and original gum with light small hinge marks, with part of its gum visible on front in areas along the edges in sheet margins, only one small corner crease confined to the upper left corner and of no significance for the designs; the finest example recorded of the largest unused multiples known, of which seven are recorded (several without gum), this being unique with two imprints, and one of just two with any imprint, undoubtedly the vastly superior also in terms of spectacularity; this stamp has only 13 unused multiples recorded (no strips known), which provides evidence of its scarcity; ex Dr. de Amaral Machado.