Rolex Yacht-Master in 18k & stainless steel with original Mother of Pearl Serti dial. Auto w/ sweep seconds and date. Ref 16623. Circa 2008. Fine Pre-owned Rolex Watch. Certified preowned Rolex Yacht-Master 16623 watch is made out of Stainless steel on a Gold & Steel Oyster band with a 18k & Stainless Steel Deploy buckle. This Rolex watch has a 40 mm case with a Round caseback and Mother of Pearl Diamond Sapphire dial. It is Gray and Sons Certified Authentic and comes backed by our 24-month warranty. Each watch is inspected by our certified in-house Swiss-trained watchmakers before shipment including final servicing, cleaning, and polishing.