A time ago I have made two same tractors as this one, but after made a building pattern, with help from Ducky for the SU 3D drawings, I would check it on mistakes, and that’s why I build this third one.
The wood I used is Ash, Cherry, Oak, Wenge, Imbuia and Beech. The model is about 30 cm (12”) long
If you are interested to build your own look here
I have made a blog of the building with a lot of picutes.
Below some more detail pictures.