Douglas C-1 A.S. 25-425, the first C-1. (U.S. Air Force)
Douglas C-1 (S/N 25-425, the first C-1). (U.S. Air Force photo)
Douglas C-1
This Day in Aviation
Important Dates in Aviation History
Douglas C-1 A.S. 25-425, the first C-1. (U.S. Air Force)
Douglas C-1 (S/N 25-425, the first C-1). (U.S. Air Force photo)