Answer first: a real Rolex GMT-Master II "Root Beer" reference 126711CHNR is a 40 mm Everose Rolesor watch with a brown and black Cerachrom bezel and Rolex calibre 3285. Counterfeits fail on four repeatable points: bezel numeral finish, dial printing under magnification, bracelet and clasp stamping, and movement beat rate. Photos alone do not settle the question. Only a Rolex-trained watchmaker with the caseback removed can confirm authenticity.

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This guide covers authentication only. It does not tell you where to buy a counterfeit.

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Prerequisites

  • A 10x jeweler's loupe or a macro lens.
  • A digital scale accurate to 0.1 g.
  • Rolex's official reference photography, or a known genuine example, for side-by-side comparison.
  • Access to a watchmaker or a Rolex service center for the final verdict.

Real vs fake: step-by-step comparison

  1. Weigh the watch on the digital scale. A genuine 126711CHNR with a full bracelet sits in the 150 g to 165 g range depending on link count. Counterfeits land well below or above it because the gold content is wrong.
  2. Look at the bezel insert under the loupe. Genuine Cerachrom is ceramic, and the numerals and graduations are filled with a thin deposited layer of gold. Counterfeit inserts show painted numerals, a sticker over metal, or flat color with no depth.
  3. Rotate the bezel one full turn. A genuine bezel moves in 24 firm, evenly spaced clicks in both directions with no wobble. Counterfeit bezels feel mushy, catch, or produce uneven clicks.
  4. Study the dial at 10x. Check the coronet shape, the spacing between the printed lines, the weight of each letter, and whether the metal tone of the model marking matches the Everose gold of the case. Counterfeit printing looks thick, uneven, or flat gray.
  5. Examine the date window and the cyclops. Genuine magnification is 2.5x, the date font is crisp, and the lens sits flat with a faint blue anti-reflective tint. Counterfeits show a distorted date, a smudged lens edge, or wrong font weight.
  6. Inspect the rehaut, the inner ring between the dial and the crystal. Genuine examples carry repeated ROLEX engraving that lines up with the hour markers. Counterfeit engraving is shallow, misaligned, or missing entirely.
  7. Check the bracelet end links where they meet the case. Genuine solid end links sit flush with no gap and no rattle. Counterfeit links show visible gaps, sharp edges, or a loose fit.
  8. Read the clasp stamping. Look for the coronet, ROLEX, and material markings with clean, deep relief and correct font proportions. Counterfeit stamps are shallow and the letterforms are wrong.
  9. Operate the crown through all three positions. Position 1 winds, position 2 quick-sets the date and the independent hour hand, position 3 sets the minutes and the 24-hour hand. Counterfeits often skip the independent hour hand or feel gritty.
  10. Watch the seconds hand for 60 seconds. Calibre 3285 beats at 28,800 vibrations per hour, which reads as eight small steps per second and a smooth glide. Cheap counterfeit movements tick 6 times or fewer per second and visibly stutter.
  11. Wind the watch fully, set it down, and check it after 24 hours and again at 70 hours. The genuine movement keeps running near the full 70-hour reserve. Counterfeits die early.
  12. Compare the serial engraving at 6 o'clock between the lugs against the rehaut engraving and the paperwork. Mismatched or rough engraving is a stop signal.

Vintage Root Beer references behave differently

The vintage Root Beer models, including the 1675/3, 16753, and 16713, use a brown bezel insert, an acrylic crystal, and in many cases a brown nipple dial. Wear, patina, and service parts make them harder to judge. On these references, focus on lug shape, dial texture, and whether the case has been over-polished. A vintage example with soft, rounded lugs has often been refinished, and that makes every other check less reliable.

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What a photo comparison cannot tell you

Photos hide the two most useful signals: weight in the hand and the feel of the crown and bezel. Counterfeit makers copy the front of the watch well and the back of it poorly. Every check that requires the caseback off, including movement finishing, jewel count, and rotor engraving, is out of reach in a photo.

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Getting a definitive answer

  • Take the watch to a watchmaker who services Rolex movements and ask for an authentication with the caseback removed.
  • Request a written statement listing the movement calibre and any replaced parts.
  • Send the watch to a Rolex service center for a service estimate, which includes an authenticity inspection.
  • Treat any seller who refuses an inspection as a no.

Counterfeit watches are illegal to import and sell in the United States, and buying one funds trademark infringement rather than watchmaking. If a deal looks too good for a Root Beer GMT-Master II, it is.