Published June 04, 2015
Aerial observers during World War II were trained specifically to use stereoscopic equipment to determine aircraft range and altitude. This artifact originally belonged to the donor's father-in-law, Anthony V. Stelzer. (U.S. Air Force photo)
The National Museum of the U.S. Air Force is located at:
1100 Spaatz Street Wright-Patterson AFB OH 45433
(near Dayton, Ohio)