Insignia, Branch of Service, Officers, Aviation, U.S. Army, MIL-DTL-15665/74A

Insignia, Branch of Service, Officers, Aviation,  U.S. Army, MIL-DTL-15665/74A 
Insignia, Branch of Service, Enlisted, Aviation, U.S. Army, MIL-DTL-15665/34G 

Aviation, Officer G.I. Polished Brass, NSN: 8455-01-179-0106
Aviation, Officer G.I. Subdued Black Metal, NSN: 8455-00-126-0000
Aviation, Enlisted Polished Brass, NSN: 8455-01-500-3605