Air Mail Issues of the United States: 1918-1944

Cat. # C3 – 2,134,888 issued First Day: May 13, 1918 Cat. # C2 – 3,793,987 issued First Day: July 11, 1918 Cat. # C1 – 3,395,854 issued First Day: Dec. 10, 1918 Cat. # C4 – De Havilland Propeller  6,414,576 issued – FDC: 8/15/23 Cat. # C5 – Air Mail Service Insignia 5,309,275 issued – FDC: 8/17/23 Cat. # C6 – De Havilland DH-4 Biplane 5,285,775 issued – FDC: 8/21/23
Cat. # C7 – The 10¢ Map Air Mail stamp of 1926 First Day: February 13, 1926 – more than 42,092,800 issued Cat. # C8 – The 15¢ Map Air Mail stamp of 1926 First Day: September 18, 1926 – 15,597,307 issued Cat. # C9 – The 20¢ Map Air Mail stamp of 1927 First Day: Jan. 25, 1927 – 17,616,350 issued
Cat. # C10 – The 10¢ Lindbergh Mail stamp of 1927 First Day: June 18, 1927 –  20,379,179 issued Cat. # C11 – The 5¢ Beacon Air Mail Stamp First Day: July 25, 1928 – 106,887,675 issued Cat. # C12 – The 5¢ Winged Globe Stamp of 1930 First Day: Feb. 10, 1930 – 97,641,200 issued
Cat. # C13 – 65¢ Graf Zeppelin   First Day: April 19, 1930 – 93,536 sold  Cat. # C14 – $1.30 Graf Zeppelin   First Day: April 19, 1930 – 72,428 sold  Cat. # C15 – $2.60 Graf Zeppelin   First Day: April 19, 1930 – 61,296 sold 
Cat. # C16 – Rotary  5¢ Winged Globe Stamp of 1931 First Day: Aug. 19, 1931 – 57,340,050 issued Cat. # C17 – Rotary  8¢ Winged Globe Stamp of 1932 First Day: September 26, 1932 – 76,648,803 issued Cat. # C18 – Chicago Century of Progress (Baby Zepp) First Day: Oct. 2, 1933 – 324,070 issued
Cat. # C19 – The Six Cent Winged Globe of 1934 First Day: July 1, 1934 – 302,205,100 issued Cat. # C20 – 25¢ Martin M-130 over Pacific Ocean First Day: Nov. 22, 1935 – 10,205,400 issued Cat. # C21 – 20¢ "China Clipper" Over the Pacific First Day: Feb. 15, 1937 – 12,794,600 Issued Cat. # C22 – 50¢ "China Clipper" Over the Pacific First Day: Feb. 15, 1937 – 9,285,300 Issued
Cat. # C23 -6¢ Eagle Holding Shield First Day: May 14, 1938 – 349,946,500 Issued Cat. # C24 – 30¢ Winged Globe Stamp of 1939 First Day: May 16, 1939 – 19,768,150 Issued Cat. # C25 – 6¢ Twin-Motored Transport Plane (Transport Issue) First Day: June 25, 1941 – 4,746,527,700 Issued
Cat. # C27 – 10¢ Transport Issue First Day: Aug. 15, 1941 – 67,117,400 Issued Cat. # C28 – 15¢ Transport Issue First Day: Aug. 19, 1941 – 78,434,800 Issued Cat. # C29 – 20¢ Transport Issue First Day: Aug. 27, 1941 – 42,359,850 Issued
Cat. # C30 – 30¢ Transport Issue First Day: Sept. 25, 1941 -59,880,850 Issued Cat. # C31 – 50¢ Transport Issue First Day: Oct. 29, 1941 – 11,160,100 Issued Cat. # C26 – 8¢ Transport Issue First Day: March 21, 1944 – 1,744,878,650 Issued
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