Rolex Sea-Dweller Oystersteel Steel Yellow Gold 43 mm watch. Model reference: 126603 or M126603-0001. Oystersteel and yellow gold case. Unidirectional rotatable 60-minute graduated, scratch-resistant Cerachrom insert in ceramic, numerals and graduations coated in gold. Black dial. Automatic movement. Oystersteel and yellow gold bracelet. Swiss made