Folded cover sent to Paraná in 1856 with black "SALTA-FRANCA" marking with laurel branches (VK.9), excellent quality! (Image)

Official cover with handstamp of the sender "Bishopric of Parana", sent to Concepción del Uruguay on 13/MAR/1883 without postage and with the marks framed "SIN CARGO" along datestamp of Paraná, arrival backstamp of 16/MAR, very nice! (Image)

Envelope of the General Administration of Bridges and Roads, sent by registered mail from Buenos Aires to San Juan on 15/AU/1911 franked with 22c. with stamps of the San Martin in oval issue (1c. x2 + 5c. x4), very nice! (Image)

4 Covers used between 1959 and 1964, they included recipes and ads (3 still contain them), with attractive postages and one with meter postage with advertising for yerba mate Nobleza Gaucha, interesting group! (Image)

Express airmail cover sent from Buenos Aires to DUBAI on 3/AU/1966 with very nice postage of 96P. and returned to sender. On back it bears 2 marks of Dakar (Senegal), apparently it was sent by mistake to that country, and instead of forwarding it to the correct destination, the postal clerk returned it back to sender! With 2 small filing holes, almost insignificant, rare! (Image)

3 Registered covers used in NO/2018, with spectacular postages of OVERPRINTED stamps, scarce! (Image)

2 Registered covers used in NO/2018, with spectacular postages of definitive stamps of the "vegetables" issue, VF! (Image)

2 Registered covers used in OC and NO/2018, with spectacular postages of OVERPRINTED stamps, scarce! (Image)

2 Registered covers used in 2018, with spectacular postages of OVERPRINTED stamps, scarce! (Image)