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Standard resistance box

1970-1979

Tapped standard resistance, 20 ohms & 160 ohms

Standard resistance

1890-1895

Standard resistance, 100 ohms, by Griffin, London

1900-1974
Tapped standard manganin-wire resistance (500,500 "true ohms") by Elliott Bros., No.300

Tapped standard manganin-wire resistance

1892-1893
Three standard resistances, each 100 amp 0.02 ohm, in wooden cases and mounted on wooden trolley

Three standard resistances

1929
Standard resistance type RS1 serial no.12378, 10000 ohm 0.03 amp, by the Croydon Precision Instrument Co. Ltd.

Standard resistance type RS1 serial no.12378

1960
Three standard resistances, oil-filled, by Gambrell, Croydon, 1960-80, (see 3 stroke numbers).

Three standard resistances

1960-1980
Standard resistance type D-558-C, 2 Megohm +- 0.5%, by Muirhead and Co. Ltd., Beckenham, Kent, no.179031

Standard resistance type D-558-C

1950
Crompton Standard Resistance No.61/2-C1900.

Crompton Standard Resistance No.61/2-C1900

Crompton Standard Resistance No.510-C1900.

Crompton Standard Resistance No.510-C1900

Three standard resistances by Guildline, Canada, 1960-80 (see 3 stroke numbers).

Three standard resistances by Guildline

1960-1980
Drysdale-Tinsley non-inductive standard resistance, 10 ohm 1.5 amp, serial no.2564, by H. Tinsley and Co., London, S.E.

Drysdale-Tinsley non-inductive standard resistance

1915