Unknown electrical component, inscribed with: ?EM 1?

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Unknown electrical component, inscribed with: ?EM 1?
Science Museum Group
© The Board of Trustees of the Science Museum

Unknown electrical component, inscribed with: ‘EM 1’, from Met Office exhibition rocket sonde model, dummy, for demonstration, by Bristol Aerojet Ltd., Banwell, Weston-Super-Mare, Somerset, England, 1962-1964

Details

Category:
Meteorology
Object Number:
1995-1949/10
Materials:
aluminium alloy, steel (metal) and plastic (unidentified)
Measurements:
overall (standing vertically): Height = 15 mm x Width = 120 x Depth = 120 mm
type:
model - representation
credit:
Meteorological Office