Unbreakable Jig-Saw Puzzle

Wonderfully titled, but relatively short-lived range of plywood jigsaw puzzles from Chad Valley, supplied in very sturdy red boxes with no guide pictures but sporting their very bold advertising logo and quoting Chad Valley Toys and Games, made at Harborne, England.
The claim of indestructibility may be somewhat exaggerated, I fear!
Please let me know if you have examples from this range which you would like me to display in this album, especially if they have some broken bits!!