MS-508 PVG POTENTIOMETER TWO METER

With four wires of 24 s.w.g. constantan connected in series to
provide effective length of 2 meter, with four wooden scales
graduated 0-50, 50-100, 100-150 and 150-200 alternatively right
and left hand to give direct reading of slide wire. With socket
terminals and three additional terminals. Mounted on polished
wooden base fitted with four rubber feet. Supplied with a knife
edge jockey