Negative "Correos de la Chimba/Bolivia" ship illustrated oval and ornate oval "Cancelado", both struck in black on envelope endorsed "Urgente" and addressed to Valaparaiso, Chile, with arrival c.d.s. on reverse, dated October 2, 1876, very fine and scarce. (Image)

Est. $250-350

1943 Founding of El Beni, plate proofs in ten marginal blocks of 20 from the base of the sheet, punched by the printer, including with and without portrait vignette, showing Waterlow & Sons' annotations in margins; the lot is enriched by two covers, one bearing the complete set of postage and airmail, and one commercial cover franked by 10c bisect, very fine and unique. (Image)

Est. $400-500