I appreciate all your answers, gents. It’s interesting to hear folk wax lyrical about a manual constant-mesh box that wasn’t a Fuller! I am aware that not all such 'boxes were as nice to use (David Brown and ZF 6-speeders, and 10-speed Spicers spring to mind, along with love-em-or-hate-em Foden ones). By the way, GOM, I remember well how those coaches flew, and they could go in the outside lane in those days! Robert