The original Willie Wonka and the Chocolate Factory was released in 1971 - just over 40 years ago.
I've always had mixed feelings about the film and in many ways the Tim Burton remake is a lot better, though both versions have their merits.
In any case if you're a fan you can now get a very tasty boxset for your collection
The boxset is pretty impressive, as it contains both blu-ray (1080p) and DVD versions of the original 1971 film, as well as an extra disc featuring a documentary.
There's also a number of Willie Wonka collectibles and a colour booklet:
Full details here