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