The Rolex Two-Tone Submariner 16613 is available on a flat-link Oyster bracelet with hollow 18 karat yellow gold center links and an Oysterlock clasp. Like other Submariner watches, the clasp on the ref. 16613 features a wetsuit extension system that allows the length of the bracelet to be adjusted on the fly to fit comfortably over wetsuits.Depending on the year of production, Submariner 16613 bracelets can be found with slight differences between their clasps, end-links, and wetsuit extension systems. Earlier examples will have hollow end-links, all-steel clasps, and stamped wetsuit extensions, while later-era 16613 Submariner bracelets will have solid end-links, a link-style extension system, and a clasp featuring a 18k yellow gold strip through the center.The ref. 16613 is the result of Rolex’s tireless quest for perfection. Its long production run has spawned several variations, making it a fun watch to “hunt” for on the pre-owned Rolex market. It’s also a popular choice for its stunning two-tone steel and gold finish, and it is an excellent option for anyone who seeks a gold Rolex sports watch without the hefty price tag that accompanies an all-gold watch.
As previously mentioned, the case also received a ceramic “Cerachrom” insert, which is virtually scratch-proof and will not fade and lose its vibrant color like aluminum. The ref. 116613 is also available with Rolex’s patented “Chromalight” lume on the dial, which offers a bright, blue glow for up to 8 continuous hours (as well as larger plots). Similar to the ref. 16613, the newer model Submariner Rolex 116613 is also available with either a blue or black dial and bezel combination. However, the Serti dials on the 116613 only come in blue or black (rather than champagne or silver), and do not feature sapphires set into the markers on the 6, 9, and 12 o’clock locations. Instead, ref. 116613 Serti dials only have 8 diamonds set in them, and feature lume-filled indexes for the 6, 9, and 12 o’clock hour markers.Both the Submariner 16613 and 116613 run on the Rolex Caliber 3135 perpetual movement with a 48-hour power reserve. However, the version of the Cal. 3135 inside the newer ref. 116613 is fitted with an upgraded paramagnetic blue Parachrom hairspring for better resistance to shocks and temperature variations.
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