The Rolex Submariner reference 16613 is one of the most popular two-tone (Yellow Rolesor) Submariner models ever produced. Manufactured from approximately 1988/1989 until 2009, it features a 40mm Oyster case combining stainless steel and 18k yellow gold, with a gold crown, bezel, and center bracelet links. It is available with a unidirectional aluminum bezel in black or the highly sought-after blue (“Bluesy”), paired with matching black or sunburst blue dials. Rare gem-set Serti dials were also offered. Powered by the reliable Calibre 3135 automatic movement with approximately 48 hours of power reserve, date display, and Cyclops lens. Water-resistant to 300 metres, the 16613 remains a highly desirable neo-vintage dive watch that perfectly balances professional capability with luxurious two-tone elegance.