20c on 1p scarlet a fine mint block of four with variety 'CORREO CORREO' for 'CORREO AEREO' on top right stamp. Difficult & underrated issue. (SG 367 & 367a)
20c on 1p scarlet a fine mint block of four with variety 'CORREO CORREO' for 'CORREO AEREO' on top right stamp. Difficult & underrated issue. (SG 367 & 367a)