Nice find. It's a Navigator badge. Used until 1947.
"The original Navigator badge was issued by the Army Air Forces and consisted of an armillary sphere centered between two wings. The badge was similar to the Aviator Badge and the Aircrew Badge. In 1947, with the establishment of the U.S. Air Force, the Aircraft Observer, Navigator, and Bombardier badges were replaced with a single design, with the Air Force shield centered between two wings. At the same time, the aeronautical ratings of Navigator and Bombardier were merged into a single rating."