1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, unused, small mark at top right otherwise very fine, signed A. Diena and Calves (Scott C2) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, unused, corner crease at lower left, cert. E Diena (Scott C3) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette tied on part envelope (reduced at foot and left) and further franked with 1910 3c, very fine, cert. Holcombe & Colomphil (Scott C3) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, unused, corner crease at top left otherwise fine, signed A. Diena (Scott C4) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, unused, small crease at foot otherwise fine, signed Calves and Kessler (Scott C5) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette tied on large part envelope along with 1910 3c red, very fine, cert. Scheller (2008) (Scott C5) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, used, some creases, cert. A. Diena (Scott C6) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, used, paper adhesion to reverse and two small corner creases, cert. A. Diena (Scott C7) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, used, some creases and a small thin at left (Scott C8) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette, unused, small crease at top otherwise fine, signed Calves and Kessler (Scott C9) (Image)

1920 Compania Colombiana de Navegacion Aerea $0.10 vignette tied on envelope (slightly reduced at foot and left) and further franked with 1908 1c & 2c, fine, cert. Scheller (2008) (Scott C10) (Image)