Physical description

Machine-made/cut, appears to be lathe turned. Electroplated, no apparent decorative elements. 14 rotatable, removable nuts. Surface finish: Brushed metal.

Inscriptions & markings

“Ratio Resistance’ Handwritten pen on paper adhered with sticky tape on top circular face. Medallion screwed to top circular face: “J.L. WILLIAM/SCIENTIFIC INSTRUMENTS/ SERIAL NO. TYPE/ MELBOURNE - AUSTRALIA.” Machine-made manufacturer’s label, enamel on brass plate (unconfirmed) screw fixed, “Resistance/between/the knobs/as shown/Resistances (+0.05 at most). Handwritten pen on aged paper label attached with coated twine.