No.4470 David Brown Tractor Three-Dimensional Puzzle (page 582)
This website http://cerealoffers.com/Kelloggs/Frosties/1970s/Jigtoys/jigtoys.html suggests that the soft plastic 'Jigtoys' version of the tractor was given away with Frosties breakfast cereal in 1970, and the tractor had not been included in the earlier series of Jigtoys (starting in 1959) in Kellogg's Cornflakes, Frosties and Sugar Smacks.

As (5) but in different colours.

As (5) again with different colours, on a printed card as (2).

As (5) but in different colours, and supplied in a small polythene bag (not illustrated) with the puzzle solution printed on a sheet of paper marked SOLUTION inside the bag, and with a stapled-on header card marked TRACTOR PUZZLE.

As above but in different colours.  Both these examples packed in polythene bags were purchased in Argentina.

As (5) again with different colours.

No.7667 Tractor (page 583)

Tractor in a box as (13) but in a variety of different colours.

Tractor again in different colours (missing driver).