This is a VERY early photos of a Sergeant that was a member of the cadre at Spence Field Army Airfield in Moultrie, Georgia under the 3rd U.S. Army Air Force.
How do I know this you may ask? Because my grandfather took advanced flight training at Spence in 1944 and I still have his DI's which matches this gentlemen's insignia.
I also say this is early because he's still wearing a black tie. Black ties were regulation up till around April of 42' when the khaki tie was made mandatory and the black ties went the way of the do-do. So, this would be VERY early for Spence considering it opened officially for trainees in February, 42'. However, the original cadre sent to establish the field officially arrived to stay in December 41'. Also of note, is the fact he's not wearing the 1938 Service Blouse... he's wearing the Model of 1926. Which in early WWII is a VERY rare occurrence.
Regards,
MARNE
PS - The patch in question, is indeed, the standard U.S. Army Air Corps. insignia.