![PARAGUAY - 1930 - VARIETY & AIRMAIL: 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) (PAR/2180)](http://latinamericanphilatelics.com/cdn/shop/products/PAR2180_{width}x.jpg?v=1660729488)
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)