10 wire, sunmica under wire, Pencil Jockey Comprising a 0.56 mm constantan wire stretched along a metre scale subdivided millimetres and centimetres, clamped to stout, plated brass end plates.The clamping system is designed to make good electrical contact with the wire at the exact ends of the scale thus leaving virtually no margin for 'end errors'.The terminating strips are provided with heavy duty 4 mm socket terminals and the whole is mounted on a stackable polished hardwood baseboard with full sunmica top supplied with Pencil Jockey. Dimension 1.10 m x 100 mm x 50 mm including terminals