Lot 51792 – SPAIN 1870 50M part sheet & 100M sheet DOUBLE PRINT

1870 50M Ultramarine in part sheet of 80 and 100M red-brown in sheet of 100 (a block of 10 cut out, with margin inscription), both imperforate on ungummed paper and both showing clear DOUBLE PRINT (including one inverted), partly showing also nice paperfolds, interesting and unusual