Control mechanisms for land, water and air craft, for engines of land, water and air craft and for component parts of engines of land, water and air craft; steering apparatus for land, water and air craft; throttle and gearbox control apparatus; seats for land, water and air craft; safety harnesses for land, water and air craft; transmission systems for land, water and air craft; parts and fittings for all the aforesaid goods; all included in Class 12, but not including chains, sprockets, chain guides, chain snubbers, hydraulic and mechanical chain tensioners or variable cam timing systems.;