Cover franked with 1923 pair 1c orange, 5c blue & 8c yellow green with Semi Official 'Airplane' overprint in black or red (Sanabria #S02, S11 & S15) tied by QUITO cds's dated JUL 17 1923. Flown on the 15 July Quito - Ibarra first flight by the Italian aviator 'Antonio Faulin' on the airplane 'La Siria' (the QUITO cds was dated 17 JUL to commemorate the anniversary of the battle of independence in Ibarra in 1823). Addressed to IBARRA with arrival cds on reverse. Very scarce. (Muller #8).