At a workshop clearance auction a few years ago I bought a mixed lot of items. Included with the tools that I had wanted were some castings for a steam loco which I put on one side. I’m just in the process of tidying out my workshop, trying to find some space, and these castings have come to light again. I believe it is a 3 1/2inch gauge 4-6-2, and the bogie has a wheelbase of approx 4 3/8 inch. The castings are in gun metal. Can anyone suggest what design they belong to please?