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Terrot HCT, HCTL, RGST…steering damper knob. Also available for Magnat-Debon.
Terrot RGST rear fork adjustment knob. Also available for Magnat-Debon C4TS.
Terrot steering damper knob for "Webb" style forks starting from 1932.
Steering damper knob for parallelogram forks on Peugeot motorbikes from 1946 to 1952.