Cover franked with 1926 4c deep blue national issue (SG 411) and 1927 6c red 'Ribon' EXPRESS issue (Hurt & Williams #4) tied by large oval EXPRESO COLOMBIANO DEL PACIFICO TRANSPORTES Y COMISIONES J.G. RIBON & CIA OFICINA DE CALI (VALLE) cancel in purple dated 13 ABR 1928 with three strikes of two line 'Conteste Ud. por este correo rapido de Ribon' marking in purple alongside. Addressed to BOGOTA with arrival cds on reverse.