Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Colombia - 1928 (July 17-19), large size registered cover from Bogota to Vienna, franked by 16 stamps (10 - on reverse), delivered by SCADTA Flight Bogota - Barranquilla, arrived to NYC on August 2 and forwarded to Vienna by a steamship (no backstamp as usual), VF, Est. $150-$200, Sc. #C38-42, CF1