GPO Telegraph Signal Indicator & Galvanometer. A GPO differential galvanometer and Linesman's detector, date coded for I think 1930's but possibly earlier. Used to detect current in either direction in telegraph circuits on receiving or sending stations. In Differential mode two coils deflect the needle left or right; if the current through both coils is equal then the needle will remain central.Also used as a piece of test equipment. Used for indication of signal direction (Current) in telegraphy systems also as a test instrument. 0 - 60 on both left and right of dial. Bevelled glass in brass bezel.
Mahogany Lancet-shaped case on plinth. Together with original crocodile clip connecting wires.
"1 A/43/45" visible but faint to back. There is a name but unfortunately it's very faint, and there is an 82 stamped on the bottom.
All-brass fittings inside and lacquered. Inside of case stamped "2 47"7" (18cm) high, 5cm (13cm) wide, 2.5" (65mm) deep. In excellent and clean condition, inside and out. Not tested as working but all components look to be in mint condition and needle moves freely.This item is in the category "Antiques\Science/Medicine\Scientific Instruments". The seller is "loubermi-0" and is located in this country: IE. This item can be shipped to Ireland, United Kingdom.