There's a photo on page 47 of 'Railways of Buchan', dated August 1950, showing an ex-LMS 2P, still in 'Big Four' livery, hauling a goods train.
Most wagons are vans, with a few opens, a low sided wagon and a container on a flat wagon, but further back there's a tank wagon, that looks like a 12t or 14t type.
Does anyone know what traffic this would have been and which company was involved? The photo describes the location as near Maud, so I can't tell if the wagon is to or from Fraserburgh or Peterhead.