The reverse of the regular-issue coin, designed by Bruce Rushin, bears a concentric design symbolically representing technological development from the Iron Age, through the Industrial Revolution and the Electronic Age to the Internet, with the inscription TWO POUNDS above the design and the date below. An oddity of the design is that it depicts nineteen interlocking gears. Because there is an odd number of them, the mechanism could not actually turn (except as a Möbius strip). The coin has the edge inscription STANDING ON THE SHOULDERS OF GIANTS taken from a letter by Sir Isaac Newton to Robert Hooke, in which he describes how his work was built on the knowledge of those that had gone before him. "If I have seen further, it is by standing on the shoulders of giants." (Newton was Warden and later Master of the Royal Mint.) Well played Rob. Derekwpg