Up for auction is a Lowrance Electronics, inc. U.S.A. made model x-15 grapgic recorder, for paper recording of water depth, fish, terrain, wrecks and debris.  Accepts all different transducer models, and the unit operates on marine 12 volt dc electrical supply.  Come without transducer, cords, or swivel bracket.  Estate find so untested, but presumably working as graphing paper still installed and visible since last time used.