Rolesor, The combination of gold and Oystersteel with a Rolex watch, is a signature attribute of the manufacturer because 1933, when the name was registered. It's a gathering of two metals: 1, noble and treasured, desirable for its lustre and balance; another, remarkably proof against corrosion, assuring strength and reliability. https://www.watchesworld.com/11-of-the-best-womens-watches/