Aircraft Spotters Handbook, Guthman 1943 Northrop The knob in the lower

The knob in the lower left corner adjusts the altimeter for the barometric pressure

the nomenclature on its face ("Elevate" and "Depress") as well as the range on the degrees scale (10 to 0 to 65deg) doesn't seem to support that identification

000 ft of altitude

continued again after the war when the vast majority of aircraft were

Aircraft Spotters Handbook, Guthman 1943 Northrop The knob in the lowerHere is a WWII era Aircraft Spotters Handbook published in 1943 by the National Aeronautics Council for use by civilian air observers. This mid size (5 by 7 inches), 370 page reference book is very comprehensive and covers nearly 350 aircraft from around the world, including airships and rotary craft. Each page describes one aircraft, dimensions, and details, including an illustration and recognition silhouettes. Its a cool paperback book, and we've