Vintage H.W. Sullivan Decade Resistance Box

The vintage H.W. Sullivan Ltd. Decade Resistance Box is a precision instrument designed for electrical measurement and experimentation. Marked "Non-Reactive Resistance", this unit features a gray metal casing, three rotary dials for adjusting resistance levels (tens, hundreds, thousands), and clearly labeled terminals. The label "Residual Resistance 0.005 Ohm (Nominal)" indicates its accuracy. The build quality is robust, with each component carefully assembled, though the casing shows signs of age and wear, which add to its authentic vintage appeal. This resistance box would be ideal for collectors of vintage scientific equipment or for educational demonstrations in physics and electrical engineering. The unit displays a sticker with information about calibration and is marked H.W. Sullivan of London.

Untested - sold as a prop only.