Inside a manilla envelope which has a cut out window. through the window on yellow cardboard you can see the RAAF insignia. Also a stamp near the insigna which reads R.A.A.F. Library from Bas Squadron Amberley. There are two metal staples down the left hand side of the envelope which is hold the manual together. There are three amendments which are inside the manual. On the envelope reads O.H.M.S. and Commonwealth of Australia.royal australian airforce - manuals, actuator type 258