TAG HEUER FORMULA 1 X SENNA, The sunray-effect anthracite dial features Senna’s distinctive “S”. It also features Senna’s name on the ceramic bezel with a unique tachymeter scale, The 44 mm steel case has a sporty style. With a special engraved screw-down caseback, this bold chronograph can withstand up to 200 metres of pressure, The satin-finished steel bracelet is designed with the iconic “S” pattern and is completed with a double-security system as well as a pilot’s extension.