Here are 4 Naval Aviation Gunner Training ViewMaster study reels issued during WWII in the set: Stereoscopic Range Estimator, Naval Aviation Training Division, Bureau of Aeronautics, United States Navy. Each reel face lists the wing span and length of the plane shown on that reel - and it lists the degrees and distance at which the photos were taken. The study reels are #5 - 8. They all come in sleeves and very good to excellent condition. I've listed the planes shown on the reels.
SR5    Martin "Baltimore," A-30, U.S. Army Attack
SR6    Vultee "Vengeance," A-31, U.S. Army Attack
SR7    North American "Mitchell," B-25B, U.S. Army Medium Bomber
SR8    Martin "Marauder," B-26B-1, U.S. Army Medium Bomber

WWII Naval Aviation Training Study Reels
Current bid:    US $16.75
End time:    Apr-06-08 11:12:46 PDT
Shipping costs:    
US $1.99
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Item location:    WALDOBORO, ME, United States