An excellent model of the Hastings gauge 33/2 sub-class, known as Slim Jims. The narrowed bodyshell was necessary for safe working through the confined tunnels on the Hastings line.
Powered by Heljans weighty chassis with centrally placed motor. 6591 is painted in the BR rail blue livery, first applied in the mid-1960s, but still carries the pre-TOPS number of 6591, the D prefix having been dropped with the end of steam working.