Cambridge Instruments pattern Fluxmeter Moving coil instrument for measuring magnetic flux. Scaled 60-0-60 (each division equals 100 micro webers) The hair spring for the top of the moving coil is open circuit but the coil itself appears OK. This instrument was given to me by Dave Allen
How much is it worth? Instruments such as this are of little use today and not many people seem interested in them. Expect to pay £5-£10.