These are bogies as fitted to most BR standard MkI vehicles as new and would be suitable for all Mk1 vehicles in 'as built' condition and most MkI coaches up to the late BR era. These bogies are fitted with fixed couplings NOT the swinging
couplings as fitted to the model as standard. If these bogies are to be fitted to a model with the swinging couplings, the couplers should be removed and the new bogies fitted. All the 39-xxx MkI coaches can be fitted with these bogies with the exception of some Intercity livery coaches and the MkI Pullmans and MkII coaches.