1870 (Apr.) New York, N.Y. to Barcelona, Spain, book packet rate by British open mail prepaid by 2¢ black on orange entire, "Printed Circular" straightline h.s., Barcelona blue "½ Rs." script style due handstamp, Very Fine. Scott No. U56  Estimate $200 - 300. From January 1, 1869, book packets, which included printed circulars, could be sent for 2¢ per ounce. This unsealed envelope contained a printed circular as marked by the sender. Barcelona marked ½ real postage due using a characteristic script-style handstamp in blue ink. $0 (Image)