Form 441. H/b, approximately 21.5 x 29cm. Essentially this is a folder to contain the navigator's notes, observations and details appertaining to the flights undertaken by his crew. March 1944 print date. Contains a sheet of fault finding suggestions for some type of receiver and two unused log sheets (2/44 dated) which have space for making observations (time, course, computed drift, compass correction, height & air temperature etc.) and the aircraft number, letter, weather details and so on. These are heavily creased with small edge tears. The folder is a bit grubby & the elastic closure strap has stretched. Quite good used. Stock code P20295.