Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Belgium - 1937 (August 23 - September 1), Air Mail cover from Brussels to US Air Mail Service New York - Cheyenne, WY via Huron, Pierre, Hot Springs (all SD) and Scottsbluff, NE, confirmation marking in lilac, arrived to NYC on August 30, upon arrival to Pierre in 1938 uprated by Washington 2c carmine, VF, Est. $150-$200, Scott #C3, C7