TAG Heuer Watch Aquaracer Professional 300 GMT Bracelet WBP5114.BA0013. Tame the high seas with this TAG Heuer Aquaracer Professional 300, your ultimate maritime companion. Crafted in ultra-robust steel and ceramic, and powered by the Calibre TH31-03 movement, this enduring 42 mm timepiece is designed for those who crave the thrill of the open sea.