Powered by Panerai's link automatic P.9010 movement and water-resistant to 300 meters, the PAM01663 has a power reserve of three days and ticks at a welcome 4 Hz. The real story here is the newly-developed case material and, while no comment is made as to Fibratech's scratch resistance (a key concern for any case material), the lighter weight and dark coloring will presumably feel (and look) great on wrist.