The Ingenieur Chronograph Silberpfeil features a stopwatch, tachymeter scale and flyback function. Its standout design element—the circular-grain dial—pays tribute to the legendary Mercedes-Benz Silver Arrow W25 racing car. The efficient double-pawl winding in the IWC manufactured 89361 caliber is one of the most outstanding innovations of Haute Horlogerie. The upper totalizer makes it possible to read off stopped hours and minutes as simply as the time on a subdial. Stopped times up to one minute are measured by the central seconds hand. Used in combination with tachymeter scale, this provides the speed at which a reference distance of 1,000 meters has been completed. This chronograph features a black rubber strap with an elegant alligator leather inlay. This limited edition timepiece is a must-have for the true connoisseur.