PROFESSIONAL sports watch manufacturer TAG Heuer has another success story on its hands. It has launched a chronometer - the ultimate in ultra-high precision mechanical timepieces - to its prestigious 6000 series, the 6000 Chronometer. The 6000 Chronometer is a natural progression for TAG Heuer in stylistic terms. While it retains all the classic technological features of TAG Heuer sports watches and the option of the stylish bracelet designed for the 6000 line, at the heart of every 6000 Chronometer is a mechanical movement approved by the Official Swiss Chronometer Control Board (COSC). COSC's stamp of approval and the certificate awarded by the world-recognised group, not only guarantee the accuracy of each 6000 Chronometer, they offer an insight into the rigorous testing a timepiece must undergo before it can gain such approval. Certification takes two weeks. Each watch is tested for accuracy under varying temperatures and in many different positions. After successful testing, each TAG Heuer 6000 Chronometer receives its individual COSC chronometer number. This is engraved on to the reverse of the case and duplicated on to a corresponding certificate. Besides being a high-precision sports watch, the 6000 Chronometer excels in design. A combination of contemporary and classic lines reflects the creativity of the Swiss watchmaker and allows owners of the 6000 Chronometer to add their own personal TAG Heuer style. The 6000 Chronometer is available in 18-karat gold-in-steel and steel models, with a choice of dials (emerald green: the latest innovation for steel and gold models only; white, silver, grey and champagne) and straps (steel/gold, or high-quality leather with a folding safety buckle). In hand with the 6000 series, the 6000 Chronometer carries the standard TAG Heuer features of scratch-resistant sapphire crystal, screw-in crown, water-resistance guarantee to 200 metres, uni-directional turning bezel and luminous hands and hours.