The TAG Heuer Formula 1 Chronograph x Senna CAZ101AX.BA0637 is a special edition timepiece honoring Ayrton Senna's legacy. It features a 43 mm fine-brushed and polished steel case with a black aluminum tachymeter bezel. The black sunray-brushed dial includes yellow, red, green, and blue accents on the 6 o’clock 1/10th of a second chronograph counter. Powered by a quartz movement, it offers functions such as hours, minutes, seconds, chronograph, and date. The watch is water-resistant up to 200 meters and comes with a fine-brushed steel bracelet. Reference number: CAZ101AX.BA0637.