Supplement No. 28 (insert) to Le Guerre Aerienne Illustree circa 1916-1918. This weekly French magazine; "The Illustrated Air War" began publishing in Dec 1916. Insert overall size is 9.5x12.5" (24x32 cm), image size is 6.75x9.5" (17x24 cm). Condition is as seen in the photo; may be some age toning, light soiling, small edge tears, etc. Paper is old magazine stock so somewhat fragile. Will be shipped flat.