Quicker by rail - and safer with BTH Speed Indicators
A British Thomson-Houston Company advert for their speed indicators. Three forms of traction are shown which presumably carried this gear: a BR Standard Class 8 steam loco, North British diesel-electric 10800 and a foreign electric loco.
This advert appears in the following categories: Traction: Foreign Steam 10800 ; Supplier: British Thomson-Houston ; Component: Instruments