Cartier Women's W1018755 Tank Solo 18K Yellow Gold Watch Swiss Made watch with Cartier Calibre 157 Swiss-quartz movement Scratch-resistant-sapphire crystal; Case diameter: 24.3 mm Solid 18kt yellow gold case with stainless steel caseback; Genuine black caiman leather strap Roman numeral opaline white dial; Sword-shaped blued steel hands; 18kt yellow gold circular crown with cabochon spinel crystal Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion