P-51H Mustang Pilot's Flight Operation Manual ME-109 likely the recommended operating limit

likely the recommended operating limit of the aircraft in which it was last installed

which is still in our possession but no worse for wear

The knurled center knob was then tightened to secure it in place

during Engine Change

P-51H Mustang Pilot's Flight Operation Manual ME-109 likely the recommended operating limitThis is an original Pilot's Flight Operation Manual for the North American P 51H Mustang as used by the US Army Air Force. The P 51H was the last production version of the P 51. It was considered the "Lightweight Mustang" and had a new wing design, a longer fuselage, and a taller tail fin. The serial number of the aircraft written on the cover, 44 64232, served with the 65 Fighter Squadron of the 57th Fighter Group and crashed on take off from Mile 26