Check the listing for details. C5 Blue Wing 16c Airmail First 1925 First Stop Transcontinental Des Monies Iowa. Color: Blue. Listed at 324.00 USD. This stamp is a must-have for any serious collector of airmail stamps. The C5 Blue Wing 16c Airmail First is a beautiful example of United States postal history from the period of 1921-1930. The stamp was used and has a Slogan Cancel, adding to its historical value. The stamp features a blue color and depicts a wing in the center. It was issued in 1925 and was part of the first stop of the Transcontinental Airmail Route in De Monies, Iowa. The stamp is ungraded and uncertified, but its quality speaks for itself. This is a rare opportunity to own a piece of American aviation history. C5 Blue Wing 16c Airmail First 1925 First Stop Transcontinental De Monies Iowa. Let me know if you have questions or need more pictures. Thanks for looking!!!