First Flight cover franked with 1929 3c purple, 1930 6c red AIR issue & 1927 1c olive green TAX issue (SG 230, 223 & 254) tied by GUATEMALA CITY cds's dated 28 JUN 1930. Flown on the inaugural flight for the GUATEMALA CITY - QUEZALTENANGO domestic route with boxed 'INAUGURACION DEL CORREO AEREO A QUEZALTENANGO DE GUATEMALA' cachet in blue with 'Quezaltgo' added in manuscript. QUEZALTENANGO arrival cds dated the same day on reverse. (Muller #37, Goodman #AM29a)