Telegraph block instrument; GNR (Luton-Dunstable Branch)
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Buy this image as a print
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Science Museum Group
©The Board of Trustees of the Science Museum
Telegraph block instrument
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GNR (Luton-Dunstable Branch). Pegging/non-pegging absolute 2-needle (top electrically/bottom mechanically operated) 3-position/3-indication. GNR ivorine-plated both "From Chaul End"/"To Chaul End" respectively. Mising the usual top-mounted bell-dome assembly and bell-tapper to RHS, but with the usual circular indented-edge bakelite-commutator.
