Omega Women's 1277.75.00 Constellation Diamond Watch Importado Precise Swiss-Quartz movement Scratch-resistant sapphire crystal with anti-reflective treatment inside Case diameter: 25.5 mm 18kt. Yellow gold - stainless-steel case; White Mother-of-Pearl dial with diamonds dial and bezel Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion