WWII Tissue Paper Escape Map Sheet 9J3

This is a single sided example covering Northern Italy, Corsica and the Adriatic. Marked ADI (Maps) Air Ministry no. 7331. Tissue maps, while sometimes issued to operational air crew, were also smuggled into POW camps from non existent relatives to aid possible escape plans. Due to their delicate nature, few have survived and even less in this condition! 16" x 12" (41 cm x 30 cm)