Guatemala 1926, Airmail first flight cover FFC from Guatemala City Guatemala to Esquipulas . Postmarked July 30, 1926. bearing at bottom left 3 lone rubber stamp cachet in red 'Via / Primer Correo Aero  / GUATEMALA - ESQUIPLAS'  and a rectangular cachet ' Primer Correo Aerro'. in black ink besides regular cds . Only 140 covers carried . Scarce item.