Large (drawing area 380 x 250 mm) flat bed X-Y plotter made by Bryant used at the Burden Neurological Institute. The pen is mounted on orthogonal axes and can be used with an internal time base as a Y-T plotter or as an X-Y plotter with external wave forms on both inputs (cf Lissajou's figures). Large flat bed X-Y plotter 1965-1970
Watanabe Instrument Corp model WX4771 Digi-Plot Flatbed A3 Plotter, s/n 11803 Watanabe Instrument Corp model WX4771 Digi-Plot Flatbed A3 Plotter 1980-1985