Navigators Information File, WWII Sally Bomber Here is a beautifully-presented chrome

Here is a beautifully-presented chrome Letter Opener promotional item from the Standard Steel Propeller Company of Pittsburgh

It is labeled as Property Air Forces US Army

Brown Ltd in 1934

to indicate Oil Pressure up to 200 PSI

While flying at the selected limit

Navigators Information File, WWII Sally Bomber Here is a beautifully-presented chromeThis is an original WWII era Navigators Information File published in 1944 by the US Army Air Force. It is the basic reference book for aircraft navigators in the performance of their duties. See photos. The page numbers are by section, so total pages are not estimated here. It is about 1 2 inch thick. All pages are intact as is the soft cover. Its hard to find another in better condition than this example.