ARMY AVIATION SERVICE INSIGNIA
For officers these insignia are worn on the left breast and are as follows:
Military Aviator—Two wings with a shield between bearing the letters “U. S.” and a star above, embroidered in silver on a blue background except the letters which are in gold thread.
Junior Military Aviator and Reserve Military Aviator—The same, omitting the star.
Military Aeronaut—Two wings with a balloon between bearing the letters “U. S.” and a star above, embroidered in white on a blue background except the letters which are in gold.
Junior Military Aeronaut and Reserve Military Aeronaut—The same, omitting the star.
Observer—A letter “O” with a single wing on the left of it embroidered in white on a blue background.
For enlisted men the insignia are embroidered in white on a blue sleeve cap let in at the shoulder seam and extending down the sleeve 5½ inches:
Enlisted Aviator—Two wings with crossed propellers between them and the number of the squadron above.
Aviation Mechanician—A circle enclosing crossed propellers with the number of the squadron above.