WW1, RFC Aeroplane Technical Manual
Original, Royal Flying Corps / Royal Naval Air Service, Air Ministry - Military Aeroplane Technical Manual.
This soft back covered manual is sized = 8" x 6" and is ½ inch thick.
It contains lots of Technical Aeroplane Drawings, b/w Photographs, Pull-outs and informative text on how to keep the aeroplane flying (Sopwith, SE5, Avro etc...).
In a good used condition (some tears to the front cover) signed by the RFC/RAF owner inside the front cover.
A very nice RFC/RNAS manual.