The trailersare also survivors but tend to loose their towbars
The Caterpollar tractor seems more difficult to find - it was only released in a set with the Scammell and is more fragile
The most common set to find with its red hubs was the last one made - the Laing decal can be found in various thicknesses.

The earlier one with metal bubs

But the first one with Civil Engineering Contractors is difficult to find

