Electrical switch in alabast and brass

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Length 6 cm.
Electricity became more widespread in Denmark around 1900 and the need to be able to call the maid with an electrical calling device arises. A cord was laid between the floorboards under the dinner table where the lady in the house would sit, from which she, with a contact like this, could discreetly call the maid when needed.

Item number: 3866