Large (10 x 14") format. Issues 1939-42 have subtitle "Aviation for Everybody", then 1943-46 it's "Air Trails Pictorial" and finally the three 1947 issues in this lot are "Air Trails & Science Frontier". About 70pp per issue, a mix of articles, photos and model plans and instructions. Generally G-VG, all covers intact, about half in poly sleeves. This is a very heavy lot (about 14" high) so some extra shipping charges will apply; please inquire.