U.S. Air Force Academy, organ in the Protestant Chapel
![U.S. Air Force Academy, organ in the Protestant Chapel](https://globalpostcardsales.com/wp-content/uploads/2020/01/101061132020U.S.20Air20Force20Academy20organ.jpg)
Unused Cooper card 3DK-1632 (and C.628) with an extraordinarily long and detailed caption, along with a special purple commemorative “Summit of Pikes Peak” sort of postmark dated Jul 10, 1970. Grade: 1