Hedges Patent Vortex Speed Indicator

Small Hedges Patent Vortex Speed Indicator (Dirty

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Small Hedges Patent Vortex Speed Indicator (Dirty
Science Museum Group
© The Board of Trustees of the Science Museum

Small Hedges Patent Vortex Speed Indicator (Dirty, quantity of fluid missing)

Details

Category:
Motive Power
Object Number:
1915-560
type:
speed indicator
credit:
Killingworth Hedges