Had some of these in 'o' gauge, GW livery back in the 1960/70s most were of the standard sort of collett come stanier type design, but i had one clerestory/corridor brake which was in post 1928 GW livery with a roundel !. The paintwork was flaking badly so we sent it back to Exleys (who were still advertising in those days) for a repaint, I remember being quite dissapointed when it came back,as it had lost its shiny baked finish, and had a satin/matt sheen that seemed to be the fashion at the time. The shell was a one piece, the roof was quite flat and it had the clerestory section made of a wood strip moulding with a separate aluminium roof strip pinned on top It had the sprung type bogies mentioned.. It was sold to a model shop in Cardiff with some other 'o' gauge course scale stuff, in the 70's, i often wonder where it went, as i dread to think what its worth now!