Original Waco Factory Instruction Manual. Troy, Ohio, The Waco Aircraft Company, 1938. 43pp plus 4 large foldout drawings, 8.5x11", original black flexible board covers. Includes Assembly Instructions, Maintenance Instructions and Parts Price List. Typewritten then printed. Covers the following models 1934 to 1938: UKC, YKC, UKC-S, YKC-S, YKS-6, YKS-7, YKS-8. Very good, cover embossing faint.