US: WWII CAA War Training Service pilot set

Wonderful full set of WWII Civil Aeronautics Administration Pilot Trainers wings and devices.  Full size Aviators Wings with beautiful feathering and image of the buffalo nickel at center, large cap badge depicting slightly smaller wing on an circular mount with "C.A.A. War Training Service", pair of uniform lapel devices, and small wing for the overseas cap.  A very rare set of WWII pilot trainers aviation devices.  Most pieces marked "Sterling. Pat. Pend."