ARGENMAIL: 5 Covers used between 2006 and 2008, VF quality (Image)

CARGO: 5 Covers used between 1996 and 1998, 4 with meter stamps + 1 with stamp! (Image)

EPSA: 5 Covers and 2 invoices posted between 1996 and 2006, VF (Image)

LA POSTAL: 7 Covers used between 1997 and 2007, with varied marks, VF (Image)

NEXO: 4 Used covers with marks of the private post, VF (Image)

OCA: 15 used covers, VF quality (Image)

OCA: 2 Covers sent by the National Museum of Fine Arts, with special stamps, on back cinderellas of the museum (2 different), VF (Image)

STC: 8 Covers with markings of the private post, VF (Image)

URBANO EXPRESS: 6 Used covers with marks of the private post, VF (Image)