White, blue lettering. Upper rear cover has mild rippling, unaffects. The story of 300 "Warbirds" who dashed up to Canada in the mid-summer of 1917 to win their wings with the Canadian RFC. Later they would form the nucleus of the U. S. Air Force. As a reward they are the only U.S. fliers in history who are privileged to sport a gold "U.S." insignia on their pilot's wings. 24 were recruited at the Boston Naval Yard and returned to form the U.S. Naval Air Services.