Standard Hedges Patent Vortex Speed Indicator as used on locomotives

Standard Hedges Patent Vortex Speed Indicator as used on

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Standard Hedges Patent Vortex Speed Indicator as used on
Science Museum Group
© The Board of Trustees of the Science Museum

Standard Hedges Patent Vortex Speed Indicator as used on locomotives (dirty and incomplete, handle missing)

Details

Category:
Motive Power
Object Number:
1915-561
type:
speed indicator
credit:
Killingworth Hedges