A pair of Geiger-Muller tubes, used to detect radioactivity rate, part of automatic recording scanner for radio chromatograms developed by Leslie Young and A.R. Morrison, 1958. 1958
Spare Geiger-Muller tube (type G24), one of four, from Ring Geiger instrument by 20 Century Electronics, England, 1950-1969 Spare Geiger-Muller tube (type G24) 1950-1969
Spare Geiger-Muller tube (type G24), one of four, from Ring Geiger instrument by 20 Century Electronics, England, 1950-1969 Spare Geiger-Muller tube (type G24) 1950-1969
Geiger-.Muller counter tube (type EHM2.) by General Electric Company Limited, England, 1939-1950 G.M. counter tube, type EHM2. G.E.C. 1939-1950
Geiger-Muller counter tube ( type B 12E), by 2oth Century Electronics Ltd., England, 1945-1950 One G.M. counter tube, type B 12E. This tube has b 1945-1950
Cintel Geiger-Muller counter tube (type GM 1B., Serial no 684) by Cinema Television Ltd., London, 1939-1950 G.M. counter tube, type GM 1B. Cin Tel. Serial no 1939-1950