Ecuador - Briefmarken 1866
Ecuador, 1866, 4 reales red VARIETY PRINTED ON BOTH SIDES, unused no gum in very fine condition. This rare stamp is according to the catalogue issued by the Banco Central del Ecuador: "es seguramente la pieza mas rara de la filatelia ecuatoriana". Scott #6c, Michel #4 DG (see also the scan of reverse). Certificate Pascal Scheller.