1925, 5 and 20 C. "AEREO CORREO" with inverted black overprints, rest of hinges, superb (Image 1) (Image)

1930, 5 cts. On 20 C. Pale brown with Misprint "1903 in lieu of 1930", in the pair with normal stamp, rest of hinge, superb (Image 1) (Image)

1930, 10 cts. On 20 C. Pale brown, overprint violet, rest of hinge, superb, Michel 800.- (Image 1) (Image)