I wish I still had the Sobell version. It was a 24" model, acquired from a jumble sale circa 1986. It too had the top-mounted controls but had a fancier front design in dark blue with a sliver and black speaker grille.
Does anyone else have an example of this chassis?
Of course being Saturday teatime, The Basil Brush Show was on BBC1 when I took the picture....

Steve
PS- Sorry about the mess. I'm decorating.