Overload definite type time limit relay by Nalders, no. 7511 Overload definite type time limit relay by Nalders
N.C.S. Electrostatic voltmeter no.158, (scaled 0-2400 volts) of the Ayrton and Mather pattern. Manufactured by Nalder Bros. and Thompson, London, with 2 spare fuses N.C.S. Electrostatic voltmeter no.158