Whizzer and Chips jigsaw letter

Here's a lovely Whizzer and Chips piece of merchandise that ace ebayer Phil-comics (here) that was up for sale recently (sale price of £20.99)

It was described thus,,,

This is a really rare item as it was given away as a prize for having a letter or joke published in Whizzer and Chips sometimes, we believe, in the early 1980s.

The jigsaw measures approx 7.5 x 5 inches and is made of thick cardboard (usual jigsaw type board used). There's a triangular shaped slip to the right side which sits folded round it loosely. The idea was to write a letter or note on the jigsaw, break it up and post it in the envelope to somebody who "will have as much fun putting the jigsaw together as they will reading the message on it". 

All other mentions of Whizzer and Chips on the blog can be found here