This is a 1930s U. Army Air Corps portable stereoscope. This item was carried by pilots to examine vertical aerial photographs such as aerial maps for stereoscopic pairings.It is housed in its original leather case. This is a great addition to any U. Army Air Corps collector's collection. International Buyers - Please Note. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Hats & Helmets". The seller is "nabejun" and is located in this country: JP. This item can be shipped worldwide.