Tracing pen for siphon recorder

Tracing pen for siphon recorder
Science Museum Group
© The Board of Trustees of the Science Museum

Details

Category:: Telecommunications

Object Number:: 1989-987

Measurements:: height 235 mm
width 180 mm
base: diameter 65 mm

type:: tracings

credit:: Muirhead Vactric Components Limited

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Tracing pen for siphon recorder

Details

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