C39 6 cents DC-4, Stamp used VF | United States, Air Mail Stamp / HipStamp
C39 6 cents SUPER LOGO CANCEL DC-4, Stamp used F | United States, Air Mail Stamp / HipStamp
Prices of US Stamps Scott #C23: 1938 6c Air Eagle
1938 Us 6 Cent Air Mail Stock Photo 1473922148 | Shutterstock
Price of US Stamp Scott Cat. C23: 1938 6c Air Eagle
Amazon.com: Air Mail - 1941-44 "Transport Issue" - U.S. 6 Cent "Transport Plane" Stamp (#C25) : Toys & Games
RARE RED AIR MAIL 6 CENT STAMP | eBay
US Airmail Stamp Twin Motor Transport Plane 6 Cent Air Mail - Etsy
1948 5c DC-4 Skymaster Coil for sale at Mystic Stamp Company
Vintage 1944 6 Cent Stamp. USA Air Mail. Stamp Shipped From - Etsy
US postage AIR MAIL 6 CENTS, RED, RARE, 1940's | eBay
Amazon.com: Air Mail Issue - 1938 U.S. 6 Cent Eagle (Dark Blue and Carmine) Stamp (#C23) : Toys & Games
Rare 6cent Red Airmail US Postage - Etsy
VINTAGE ~ AIR MAIL ~ Red 6 Cent Stamp ~ Cancelled/Posted ~ 009 | eBay
6 Cent Air Mail Stamp - Etsy
1934 6c Rotary Perf 10-1/2 x 11 for sale at Mystic Stamp Company
Airmail Founding of Alexandria Stamps (6 Cents Each) — Little Postage House
6 cent air mail Values - MAVIN
1946 5c DC-4 Skymaster for sale at Mystic Stamp Company
Red Air Mail Stamps | Skymaster (5 Cents Each) — Little Postage House
RARE VINTAGE 1949 U.S. AIRMAIL 6 CENT STAMP COLLECTORS ITEM | eBay
Prices of US Stamps Scott #C23: 1938 6c Air Eagle
1941 6c Rotary Press for sale at Mystic Stamp Company
C41 6 cents Small Plane, Coil Pair Stamp mint OG NH XF | United States, Air Mail Stamp / HipStamp
