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Bendix / King KLN-90B IFR GPS Pilot's Guide. P/N 066-08773-0000. It is NEW, original factory manual, still wrapped in the clear plastic. It is over 1/2" thick very detailed manual going in depth through all aspects of operation of the GPS. Spiral bound for easy use in 8 1/2" by 11" format. It retails for over $70.