Cartier Men's W1018355 Tank Solo Stainless Steel Black Leather Watch Swiss Made watch with Cartier Calibre 690 Swiss-quartz movement Scratch-resistant-sapphire crystal; Case diameter: 27 mm Solid rectangular polished stainless steel case with genuine black alligator leather strap Roman numeral silvered opaline-white dial; Blued steel sword-shaped hands; Stainless steel circular crown with synthetic cabochon spinel crystal Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion