Silvertown resistance box No. 731 (1917)
1917
Resistance box
1912
Resistance box
Resistance box
1900-1940
Plug resistance box by Townson and Mercer
1900-1980
Resistance box no. L 170297 by the Cambridge Instrument Co. Ltd.
1940-1950
Plug type resistance box
Resistance box, 10 ohms, with cylindrical plugs
1900-1939
Resistance box 1 megohm
1938
Ferranti Ltd type NS resistance box
Resistance box
Plug type resistance box in German silver wire
1880
E.T.Co. resistance box, in B.A. units
Resistance box
Ferranti resistance box
Ferranti resistance box
Non-inductive resistance box
Constantan resistance box
Resistance box from Threlfall gravity balance
Resistance box
1936
Ferranti resistance box
Resistance box No.51580 by St. N.T.S's Fabrik
1875-1924
Sullivan & Griffiths non-reactive resistance box
1952
Resistance box no.31445
Resistance box no.1077 marked "Refilled by Gambrell Bros"
Resistance box type K13B with "petticoat" plugs
Ferranti resistance box
Ferranti resistance box.
Decade resistance box type A-25-P serial no. 178444
Resistance box
1925-1930
Resistance box, for Ediswan Pointolite Lamp; and ‘Bakelite’ screw-threaded fitting in two parts
Resistance box
1908-1916
Dr C. V. Drysdale's Universal Standardising Bridge made by H. Tinsley and Co.
Resistance Box Type BG392AL
1955
Tapped resistance box
Callendar & Griffiths self-testing resistance box
1899