Brass Mounted Circular Antique Aneroid Barometer on Wooden Shield. Brass mounted on a mahogany shield with a white enamel dial. Inscribed “J.H. Steward, 406, Strand 457 west Strand LONDON. Longstanding crack to glass, hence price.
The resistance dialled up on each of the three selectors is added together and connected to the two brass screw terminals on the panel. Resistance ranges are in tenths, units and tens giving a total range of zero to 111 ohms.
Measures 32 x 13 x 12 cms.
