The Montblanc 1858 Unveiled Timekeeper Minerva Limited Edition introduces a brand-new chronograph function. Instead of using traditional pushers, the chronograph is activated via the fluted bezel. Just one click of the white gold 750/1000 (18 karats) fluted bezel will start the chronograph. A second click will stop it, and a third click will reset it, transforming the chronograph as we know it. The timepiece comes in a 42.5 mm stainless steel case and is fitted with a blue dial and a blue interchangeable alligator leather strap. It is powered by the hand-finished manually wound Caliber MB M13.21 and is limited to 100 pieces in reference to the 100-year anniversary of the Caliber 13.20 which was the ancestor to this movement.