Most of what you need to build a 4 inch scale Tasker steam tractor, including a beautifully built silver soldered copper boiler by Cheddar, finished wheels with vulcanized tyres, what appears to be a complete set of castings and 11 sheets of drawings with a couple of supplementary sheets - can't find sheet 6, otherwise complete.
One of the smaller 4 inch scale engines, it could be built with modest workshop equipment - and you wouldn't need a great big trailer for it when finished.
scale | 4 inch |