Pablo Picasso was one of the most prolific artists of his time, so the odd appearance of a never-before seen piece wouldn't have been particularly extraordinary.

But you wouldn't have seen this collection of early Picasso pictures anywhere in the world because it's been stashed in a box at the back of a garage for nearly 40 years.

Now almost 300 of them have surfaced, from the most unlikely source and it has sparked a legal battle between the Picasso estate and an electrician who unveiled them.

Al Jazeera's Guy Henderson reports.