Crafted with 644 brilliant cut white diamonds and 428 brilliant cut black diamonds, Nokia is adding another luxury phone to their Signature series. The Vertu Signature Diamonds collection was first introduced in Oct 2006, each model includes 388 mechanical components. A total of 74 patents protect its intellectual property. According to Nokia, eight designers had spent a total of four man-years perfecting the feel of the keypad. Assembled by hand, the process is so complex that it even takes an expert up to three years to learn how to assemble a Vertu Signature.