Moving Coil Galvanometer by Philip Harris [vintage]
From the Philip Harris catalogue 50the ed. 1950: 6746 Galvanometer, The Harris Moving coil. Comprising dust-proof enamelled metal case, provided with three levelling screws, terminals, spirit level, and fitted with silvered metal scale, which is graduated 0 to 3o degrees from each side of a central zero, and is 60 mms. in length. . .