Quick answer
The correct reference is 116719BLRO. "116719BLSO" is a common misspelling. Rolex built this watch from 2014 to 2018 in 18k white gold with a blue dial and a red and blue Cerachrom bezel. A replica can copy the case shape, the dial print and the bezel colors. It cannot copy the metal. Replica cases are steel with plating, so the watch weighs less and the color is a coating, not solid gold. Prices for a replica of this reference run from about $120 to about $800, and the gap between tiers shows up in the bezel insert, the hand stack and the dial print.
What the original watch is
Rolex showed the 116719BLRO at Baselworld in 2014. It was the first GMT-Master II with a bezel made of two ceramic colors in one piece. The case is 40 mm in 18k white gold. The bezel is Cerachrom with a 24-hour scale and numerals filled by PVD with platinum. The dial is blue with applied hour markers in white gold and Chromalight lume. Inside sits caliber 3186 with a 48-hour power reserve and 28,800 vph. Water resistance is 100 m. The bracelet is an Oyster in white gold with an Oysterlock clasp and Easylink. Rolex discontinued the reference in 2018 and replaced it with the 126719BLRO, which uses caliber 3285 and a 70-hour reserve.
- Case: 40 mm, 18k white gold
- Bezel: Cerachrom, red and blue, 24-hour scale
- Dial: blue, white gold markers, Chromalight
- Movement: caliber 3186, 48-hour power reserve
- Water resistance: 100 m
- Bracelet: Oyster, white gold, Oysterlock, Easylink
- Production years: 2014 to 2018
What good replicas get right
Top-tier replicas use a 1:1 case scan, so the lugs, crown guards and rehaut angle match the original within a fraction of a millimeter. The dial print, the date window position and the cyclops magnification of about 2.5x are close on the best examples. Many of these watches use a clone of the 3186 or the 3285 with a working GMT function and a jumping hour hand.
Where replicas fail
- Bezel color. The red on low-tier inserts leans orange or brown, and the line between red and blue is soft. On the original the color runs through the ceramic.
- Metal. White gold has a warm tone and a density steel lacks. A plated steel case weighs less, and the plating can wear at the clasp and lugs.
- Hand stack. On caliber 3186 the hour hand sits below the GMT hand, then the minute hand, then the seconds. Many clone movements place the GMT hand at the bottom.
- Bezel action. The original bezel turns in 24 clicks with no play. Many replicas have a loose bezel or a stiff one that will not index.
- Date and cyclops. Font weight and the black hole effect at the edge of the lens differ.
- Bracelet. End link fit, clasp stamping depth and the sound of the clasp closing all vary by factory.
Price tiers
Under $200 buys a watch with a painted bezel insert, a 2813-type movement and a GMT hand that moves with the hour hand instead of jumping on its own. From $250 to $450 you find ceramic inserts, a 2836-based GMT and better dial print. Above $500 the case is often 904L steel, the movement is a clone 3186 or 3285, and the bezel insert has a sharper color split. No tier delivers white gold.
Legal note for US buyers
US law bans trafficking in counterfeit goods under 18 U.S.C. § 2320, and CBP can seize counterfeit shipments at the border. Selling a replica as a genuine Rolex is fraud. Buying for personal use carries less legal risk than resale, but the import risk stays.