Telegraph Works Galvanometer, c.1920

For single current type ( 22ohms) with 2 brass terminals, 4 quadrant scale 0-90, and compass type pointer. It would have been used by engineers testing lines for the Post Office in conjunction with a Wheatstone Bridge. British made, circa 1920.

Signed 'Teleworks, Silvertown London, No. 2752'.

No-Serial Model Featured in the Powerhouse Collection.

Diameter: 9 cm

Depth:  5 cm

Weight: 1 lb. 8.7 oz.