Revised description of the currently preserved 72XX locomotives (how they appeared at the time they left service) :
7200 curved drop end, raised running plate over the cylinders, Collett (later) pattern motion bracket. Started life as a later built 42XX (which had become 5275 before conversion into 7200 )
7202 curved drop end, raised running plate over the cylinders, Collett (later) pattern motion bracket. Started life as a later built 42XX (which had become 5277 before conversion into 7202)
7229 retained the square drop end, straight running plate over the cylinders, and Churchward motion brackett from an earlier built 42xx (which had become 5264 before conversion into 7229) 😀? LOL