Unaddressed printed 'Presidencia de la Republica' airmail envelope franked with 1947 30c brown, 30c purple and 30c blue OFFICIAL issue with 'Primero la Patria! Servicio Interno AEREO' AIRPLANE overprint, the 30c blue with variety 'AEREO' OMITTED (Sanabria #206, 207c & 208) all tied by QUITO cds's.