G.P.O. four-bar switch (Regn.1050)

G.P.O. four-bar switch (Regn.1050)

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G.P.O. four-bar switch (Regn.1050)
Science Museum Group
© The Board of Trustees of the Science Museum

G.P.O. four-bar switch (Regn.1050)

Details

Category:
Telecommunications
Object Number:
1923-224
type:
switch
credit:
Institution of Electrical Engineers