Fairly heavy edgewear, with some bumping and light fraying at spine ends and corners; some rubbing/wear and soiling to the flexible boards, though gilt text on front cover still very clear, if a bit dulled; vertical creasing to front board; some creasing along spine; rear hinge cracked; previous owner name, location and date on front free end paper; several of the pages have very small closed tears. Fold-out diagrams in very good minus condition, with darkening and light wear or tears to edges of some; largest one at rear unstitched from binding but still present.; Illustrated with: photos of aviators, black & white photos of engine parts and instruction, working diagrams, numbers of fold-out engine diagrams, both within text and at end of book. Front cover title reads "Instructions for the Care and Operation of Model A-I. and E. Hispano-Suiza Aeronautical Engines."; 12mo; 216 pages