Antique Central Scientific Company d'Arsonval galvonometer model 2415. The CENCO trade mark started being used in 1909, so I believe this one was made prior to this. It is missing the scale and the glass was broken inside the casing, pictures provided. Still a pretty cool piece.
Antique Central Scientific Co. D'Arsonval Galvanometer Model 2415
$370.0
Time Period Manufactured
Pre-1930