Omega Women's 123.10.27.20.51.001 Constellation Co-Axial Automatic 27mm Swiss Automatic Silver-Tone Watch Round watch with modified sunray dial featuring Roman numeral-etched bezel and diamond hour markers 28 mm stainless steel case with anti-reflective sapphire dial window Swiss automatic movement with analog display Stainless steel band with deployant clasp with push-button closure Water resistant to 100 m (330 ft): In general, suitable for swimming and snorkeling, but not scuba diving