Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - United States - 1918 (May 15), Curtiss Jenny 24c carmine rose and blue, used in the First Day of issue on First Flight cover from NYC to Philadelphia, addressed to Belleville, IL, tied by ''Air Mail Service Wash, N.Y., Phila. May 15. 1918. First Trip'' violet marking, unclaimed and returned to sender, light fold at right, still F/VF, C.v. $750, Est. $500-$600, Sc. # C3