Invicta Men's 3891 Anatomic Collection Russian Diver Watch Precise and high-quality Swiss-quartz movement Durable mineral crystal Case diameter: 45.6 mm Thermo-polymer and stainless-steel case; white dial; date function at 4 o'clock; chronograph functions; crown safety feature Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving