The IWC Ingenieur Chronograph Silberpfeil ref. IW378511 pays homage to the legendary Mercedes-Benz Silver Arrow W 25 —Silberpfeil— racing car. The Mercedes-Benz Silver Arrow W 25, had a dashboard with a steel surround with circular-grain decoration just like the 'perlage' —circular graining— on the center of the dial of this robust chronograph. The IWC Ingenieur was originally launched in 1944 and since then, it has experienced several changes and major redesigns.