19th Century Single-Current Galvanometer (Unsigned)

Unsigned Galvanometer. Made of Walnut and lacquered brass. Marked 90-0-90. Half-blue steeled needle, with Ruby pivot. Original glass. Late 1800's.

Diameter (Dial): 2.5"

Diameter (Base): 4"

Depth: 1.5"

Weight: 6.6 oz.