The Rolex 16623, or Yacht-Master 40, is a luxurious, sporty watch produced in 2006. It features a 40 mm case of stainless steel and 18k yellow gold, with a bidirectional gold bezel and scratch-resistant sapphire crystal. Water-resistant up to 100 meters, it has a luminous dial available in several colors, powered by the automatic Rolex Caliber 3135 movement with a 48-hour power reserve and COSC certification. The watch includes an Oyster bracelet with a folding safety clasp. Notable for its blend of elegance and functionality.