The first manual covers the Hercules III.X & XI engines. These were primarily used in the LANCASTER MKII, & first issued to 115 Squadron,5 Group in October 1942. Also used in the WELLINGTON & HALIFAX Bombers.
Large thick manual full of illustrations in black & white & colour..Also a lot of information and many breakdowns of engines and component parts. To big to fully appreciate but many images shown. Many of the information sheets are hand written.
The other book covering steel & materials plus riveting etc. These are both original and appear complete.The weight of the larger manual is 800 grams and size 34 x 20 cm (13 x 8 inches). RAF mechanics manuals.