Beautiful AAF escape chart, printed on synthetic silk cloth. These extremely detailed aeronautical charts were issued to pilots during WWII to be worn as neck kerchiefs under their flight suits as part of their survival gear in the event they were shot down. Always two sided, chart NK 50 covers "Jehol" with the other side NK 5513 covering "Shen-Yang". Both on a 1:1,100,000 scale.