Counter unit
Counter unit, steel, made by Ecko Electronics, 1950-1960, Great Britain
Scintillation counter, metal, comprises counter unit, flow counter, and probe unit, by various makers, English, from Middlesex Hospital, 1950 to 1960
Counter unit, steel, made by Ecko Electronics, 1950-1960, Great Britain
Flow counter, steel, made by Tracerlab, Boston, Massachusetts, USA, 1950 to 1960
Probe unit, steel, made by Dynatron Radio, Maidenhead, Berkshire, 1950 to 1960