Tapped standard manganin-wire resistance (500,500 "true ohms") by Elliott Bros., No.300 Tapped standard manganin-wire resistance 1892-1893
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
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
Three standard resistances, each 100 amp 0.02 ohm, in wooden cases and mounted on wooden trolley Three standard resistances 1929
Three standard resistances, oil-filled, by Gambrell, Croydon, 1960-80, (see 3 stroke numbers). Three standard resistances 1960-1980
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