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Not stamped on this photo, but from other similar photos in the group I am sure that this is from the Synthetic Training Section, AAFNS, Hondo, Texas.AAFNS was the Army Air Force Navigational School at Hondo Air Base during WW2. They trained bomber and transport navigators.
We see in the photo the following:Wiring Diagram - A2A Trainer
Hondo Army Air Field - TexasIt should be noted that it indicates it was drawn at the AAFNS at Hondo, the date was November 4th, 1943. The department on the blueprint is "Bomb-Trainer". You can see a bomb release switch labeled in the diagram, along with wiring to the autopilot.This is a large "synthetic" trainer. I believed they called them "swing" trainers, but here it is apparently called a bomb trainer. I am guessing that this is the wiring diagram for the trainer. It is labeled as restricted so would not be readily available to anyone but the top officers.A very rare and unique photo. The history of the Hondo Air Base is extensive and online, check it out on Wikia.
Be sure to check out the other photos I have listed from this grouping.Measures 8 x 10J102720
