Marklin

Marklin's model was used as a background engine in the first series of Thomas and Friends, many scrap models on Thomas and Friends were used in some episodes, In Blue Mountain Mystery, Marklin's model was seen as a scrap model, it's not confirmed if the scrap model is really model, but it's the same model as Marklin, some people belive that the scrap model is Puffa from TUGS or Arthur from Thomas and Friends.