1936 First International Rocket Flight, 20th Anniversary Double

1936 First International Rocket Flight USA over the Rio Grande to Mexico. On landing the rocket struck a tavern in Mexico & all the contents were confiscated by Mexico custom officials. 150 of these carried covers were later recovered & sent from Reynosa PO on the 20th anniversary. This example has the 'Dispached' cachet spelling error of which just 73 exist.