From the Essentials Collection. Adding classic automatic timekeeping to the Essentials Collection, this versatile timepiece winds with the movement of the wearer’s wrist, and never needs a battery. Visible through the screwdown see-through caseback, the 23-jewel movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 41 hours and manual winding capability. With a sophisticated sunray finish, the blue dial includes a calendar and crisply defined hands and markers. Crafted of stainless steel, with tri-fold push button release clasp. 10 bar, 100M Water Resistant