United States Event Cover Lot of 2. Descriptions in order of scans:
1)
Dedication of Earl Zimmerman Airport - Rocky Ford, Colorado. Sent from
Colorado Springs, Colorado on May 30, 1930 at 8PM. Addressed to Detroit,
Michigan.
2) Second Annual Womens Air Derby - August 19-20,
1930. International Airport. Douglas, Arizona and Agua Prieta, Sonora,
Mexico. Sponsored by Chamber of Commerce. Sent from Douglas, Arizona