Potentiometer – 1 Wire: Slide wire pattern with one wire, 1 meter long, mounted on a polished wooden base with boxwood rule graduated 0 – 100 cm x 1 cm with three socket type 4 mm terminals to enable the apparatus to be used either as a one meter or two meter instrument with sliding jockey.
Potentiometer – 4 wire: Same as Wire1 with 4 wires of 24 SWG Constantan connected in series to give effective length of 4 meters; with two terminals. With jockey having knife edge press keys type giving accurate contacts & a terminal for connection.
