ANTIQUE VINTAGE RARE GALVANOMETER , chipped glass

Rare 1920s Leeds & Northrup Wheatstone Bridge Open Dial Decade Resistance Device

Vintage Hilger & Watts Wooden Instrument Case Box Dovetail Brass Galvanometer UK

Herman H. Sticht Vintage Swiss-Made Hand-Held Mechanical Tachometer with Case

3 x Vintage Amp Meters, Gauges - Steam Punk - Repurpose

Cenco Vintage Scientific Ammeter 1 AMP 125V Collectible Instrument

Vintage Short & Mason London Anemometer Instrument-Wind,Speed,Mining,Air Flow.

Series Resistance box, Nalder Bros & Thompson, antique, vintage, wooden case.