Zenith Defy Extreme

The 45-mm Defy Extreme 1/100th in titanium (Ref. 97.9100.9004/02.I001) is powered by the El Primero 21 automatic movement with two escapements beating at 50Hz and 5Hz, making it the fastest mechanical watch. This version retails for $18,000.00 and comes with a matching matte titanium strap as well as a rubber strap and a Velcro strap (with quick-release system).