Complete folded letter dated Asunción 19/FE/1812, to Buenos Aires, with straightline red "PARAGUAY" and manuscript rate, superb, very rare (it is very unusual to find prephilatelic folded letters of Paraguay!) (Image)

Cover of the Ministry of Foreign Affairs franked with official stamps of 1886 imperforate: 1c., 10c. 15c. and 20c., with double circle Asunción cancel with star, sent to Buenos Aires, rare and very interesting! (Image)

24/MAR/1929: Registered cover franked by Sc.C1/3 + another value, sent via airmail from Asunción to Buenos Aires, excellent quality, rare! (Image)

Cover front of 1931 with interesting cancels + Zeppelin cover of 1935 sent to Germany (minor defects), low start! (Image)

Cover flown by ZEPPELIN, sent from Asunción to Düsseldorf on 9/JUN/1934, handsome postage (with little staining around the perforations), and arrival backstamp of Friedrichshafen 19/JUN, very attractive! (Image)