Matchbox toys were the staple of pocket money toys when I was a lad and I remember these two models with great affection.
The Caterpillar DW20 was of a type I remember seeing as a youngster when the M62 was being built close to where we lived at the time in Milnrow where Junction 21 was sited.
I'm not sure I ever saw a real version of this Pickfords low loader, although I remember playing with the model.
Matchbox were to produce 15 models in the Matchbox Majors series. These two were the only ones I remember playing with though.