Unipivot Versatile Galvanometer, Cambridge Resistance Meter, and D.C. Range Box, all by the Cambridge Instrument Co. Ltd., 1950-62 (see 3 stroke numbers).
Unipivot Versatile Galvanometer by the Cambridge Instrument Co. Ltd., England, serial no. L384858, ranges 120 mV at 500 ohms resistance and 2.4 mV at 10 ohms resistance
Cambridge Resistance Meter, Scroggie patent, by the Cambridge Instrument Co. Ltd., England, serial no. L322852, with four ranges marked X .01 to X 10 (for use with a Unipivot 2.4 mV 10 ohm galvanometer)
D.C. Range Box by the Cambridge Instrument Co. Ltd, serial no. L319550A, ranges 0.2 mA to 10 A and 0.1 V to 1000 V (for use with a Unipivot 120 mV 500 ohm galvanometer)
