The ref. 16710 is outfitted with a standard 40mm Oyster case with water-resistance up to 100 meters and a protective sapphire crystal over the dial. The bezel is equipped with an aluminum insert in either all-black, red and blue, or red and black. Depending on the year of production, the watch is also available on the secondary market with cases that have either lug holes or no lug holes, and the luminous material on the dial will vary, as Rolex made the switch from Tritium to LumiNova during the production of the reference 16710 GMT-Master II.With the release of the ref. 116710 came a brand new case design that includes the upgrade to a triple-sealed Triplock screw-down crown, a new bezel mounting system that operates on 24 clicks instead of 120, a tougher “Cerachrom” bezel insert crafted from a scratchproof ceramic material, and a “Maxi” dial topped with larger hour markers and wider hands. The 40mm case also received a larger crown guard and wider lugs, earning it the nickname the “Super Case” among collections due to its thicker and more aggressive overall appearance.The ref. 16710 is equipped with the self-winding Rolex Caliber 3185 perpetual movement, which includes a Quickset function for easy adjustment of the date mechanism, hacking, an independent 24-hour hand, and a 48-hour power reserve. However, near the very end of production of the ref. 16710, Rolex switched movements, and later-era examples of the reference 16710 were equipped with the Caliber 3186 movement. The Caliber 3186 has the same specifications as the Caliber 3185 but is now equipped with Rolex’s newer paramagnetic blue Parachrom hairspring and a smoother operating jump-hour hand. With that in mind, all reference 116710 GMT-Master II watches run solely on the Caliber 3186.
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.
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