Zenith DEFY EXTREME DOUBLE TOURBILLON 45 mm Silver Dial Black Carbon & 18k Rose Gold Rubber Strap 12.9100.9020/78.I200

High-frequency Haute Horlogerie in its most rugged form: the DEFY Extreme Double Tourbillon features a 1/100th of a second chronograph in a carbon fibre and rose gold case, with a 60-second tourbillon driving the time and a 5-second tourbillon driving the chronograph for ultimate precision.