Product description Drive Type: Automatic Specifications: Calendar (date / week). Case and Strap Material: Stainless steel Caseback Screwback (See Through Back) Glass material: crystal glass Accuracy: ±60 seconds per day Waterproof and Daily Protection Size (H x W x D): Approx. 1.4 x 1.4 x 0.4 inches (35 x 35 x 11 mm) (excluding lugs and crown), Weight: Approx. 3.5 oz (100 g). .com Review The Seiko Men's Automatic White Dial Stainless Steel Watch boasts high-tech Japanese automatic movement hidden behind classic analog styling. Precise 21-jewel Japanese automatic movement keeps this watch functioning without a battery--it powers automatically with the movement of your arm. This high-tech feature is tucked away behind the watch's white dial, which boasts luminous gold-toned hands and baton hour markers. The dial also sports a date window at the three o'clock position, and the entire dial is protected by a Hardlex mineral crystal. Keeping all of this securely on your wrist is a brushed-and-polished silver-toned stainless steel link bracelet that closes with a fold-over clasp. Other features include a stainless steel case with an exhibition case back and water-resistance to 99 feet (30 meters).