Class O4/2 2-8-0 No 6286, still fitted with continetal pattern buffers and sockets where side chains were fitted, heads an up train of coal empties from Perth between Glenfarg and Mawcarse Junction in c1928/9.
initially I thought that was a demountable container on the first wagon, but it is not. It is a complete open wagon from solebar upwards, roped to a NBR 3 plank wagon!

Photo: T.G. Hepburn/Rail Archive Stephenson