Drawing inspiration from the iconic Datejust design and powered by the renowned Seiko NH35 automatic movement, the Seiko Mod Datejust combines high-end craftsmanship with accessible luxury in a timeless 36/39 mm package. Case Size: 36 or 39mm Case Thickness: 13 mm Glass: Sapphire Wrist Size: Universal (adjustable) Case Material: Stainless steel Strap Material: Stainless steel Movement: NH35 Seiko Movement with date Water Resistance: 10 ATM Suitable for normal daily wear and swimming. Backside: Transparent case back Movement: Manufacturer: Seiko Instruments Model: NH35 Automatic Power Reserve: 41+ hours