U.S. Scott 650 5 cent Aeronautics Conference issue paying the 5 cent air mail rate. The cover was mailed from Denver, Colorado to Buffalo, NY on August 29, 1929. Cover has corner card of the Great Western Sugar Company. Roughly opened at top (see scans).
U.S. Scott 650 on 1929 Airmail Cover
Returns accepted for up to 30 days from the date of mailing, for any reason, as long as the item is returned in the same condition that it was sent.