Isis. Signature Puzzle (Andrew Reeves Collection)

Sonicwarp launches a limited edition purple and gold isis engraved with the inventors signature. Each Isis comes in a black presentation box with a certificate of authenticity signed by the Inventor

As seen on BBC2's DRAGONS' DEN.

Welcome to the ISIS Signature, possibly the most difficult puzzle in existence, (well according to it's creators). Now it's your turn to put their theory to the test.

 The ISIS Ball is an alloy orb constructed in layers and covered in hieroglyphics. All you have to do is open it by cracking the combination. You've heard of the riddle of the sphinx, well this is bound to rival any ancient conundrum! Once you've cracked the combination and opened the orb, a unique key number will be revealed. On presentation of this key number, the makers of the puzzle will send you a key which will open one of the ISIS golden pyramids which are hidden in secret locations throughout the world.

The golden pyramids contain tens of thousands of pounds - a gold coin worth £500 and a number of silver coins worth £20 each. The designers are so confident that the code cannot be cracked that they have put up money for anyone who can do it! Sounds irresistible. It is!

"The ISIS is the result of years of research and development and is completely original. There are literally millions of combinations and the game promises to challenge the most astute and intellectual of minds. Once you pick one of these things up, it becomes a real obsession and you just can't put it down until you crack the code....but that may never happen!" Andrew Reeves (creator)

And Every ISIS is unique, and handmade in England by precision engineers. It also looks and feels beautiful, and comes in a solid wooden box with high polish! So, let your Isis Signature begin!