The Rolex Submariner Date Reference 16613 with a "Serti" Sultan dial is a highly collectible luxury diving watch produced from the late 1980s until around 2009. 

This model stands out because it blends extreme utility with high-end jewelry styling. The term "Serti" comes from the French word sertir, which means "to set," pointing to the factory gem-set hours. The combination of its champagne or silver dial paired with diamonds and sapphires is traditionally nicknamed the "Sultan" dial by collectors.

• The "Sultan" Serti Dial: This factory-original dial swaps standard luminous geometric plots for 8 round-cut diamonds at the standard hour marks. It features 3 baguette-cut sapphires at 6, 9, and 12 o'clock, alongside a classic Cyclops magnification window over the date at 3 o'clock. 

• Rolesor Construction: The case and outer bracelet links are crafted from high-grade Oystersteel, while the bezel, winding crown, and center bracelet links feature radiant 18k yellow gold. 

• The Bezel: It features a 60-minute unidirectional rotating bezel, usually fitted with an anodized aluminum insert in vibrant blue to complement the sapphires on the dial.

• Oyster Bracelet & Folding Clasp: It is paired with a two-tone Oyster bracelet. Older productions feature the standard stamped steel/gold folding clasp, while later versions (late 1990s onward) feature the upgraded Oysterlock folding clasp with a gold stripe running through the clasp buckle. 

• The Movement: It is powered by the legendary Rolex Caliber 3135, a self-winding chronometer movement renowned for its durability, accuracy, and 48-hour power reserve.