Short answer

The Rolex 116613 is the two-tone Submariner Date: a 40 mm Oystersteel case with an 18k yellow gold bezel, crown, and center bracelet links. A fake Rolex 116613 is a replica of that watch, and quality ranges from crude to close. Judge a replica by details you can measure and see under magnification: gold tone and plating wear, bezel insert engraving depth, dial text alignment, rehaut printing, bracelet end-link fit, crown thread action, and movement rate.

Reference facts to compare

Use the real reference as your baseline, not the seller's photos. The 116613 uses a 40 mm case, a sapphire crystal with a Cyclops lens, a Cerachrom ceramic bezel, and a Caliber 3135 movement. The two-tone finish combines Oystersteel with 18k yellow gold on the bezel, winding crown, and the center links of the Oyster bracelet. Variants include the LN with a black dial and bezel and the LB with a blue dial and bezel.

Prerequisites

  • 10x jeweler's loupe or a macro lens
  • Digital calipers
  • Kitchen scale readable to 0.1 g
  • Bright, diffuse light and a soft microfiber cloth
  • Reference photos of a genuine 116613 from at least two angles

Inspection procedure

  1. Weigh the watch head and bracelet on the scale, then compare the total to the published spec for the exact variant.
  2. Measure case diameter across the bezel at 2 and 8 o'clock with calipers and confirm 40 mm plus or minus 0.3 mm.
  3. Hold the loupe over the bezel insert and check that the numerals are cut or filled with clean edges and no blur.
  4. Examine the rehaut ring at 12 o'clock and confirm the ROLEX engraving sits centered and aligned with the dial coronet.
  5. Inspect the dial printing: crown logo, ROLEX, OYSTER PERPETUAL DATE, and depth rating must be crisp, level, and free of double edges.
  6. Check the date window at 3 o'clock for a flat, centered disc and a Cyclops magnification near 2.5x.
  7. Open the clasp and look for clean stamping, correct coronet shape, and even spring-bar tension.
  8. Flex the bracelet and check center-link gold color against the bezel gold under the same light.
  9. Unscrew and reseat the crown; threads should engage smoothly with no grit or cross-threading.
  10. Place the watch on a timegrapher and record rate, amplitude, and beat error at full wind.

Red flags that end the inspection

  • Gold that reads brassy or gray next to the bezel
  • Bezel numerals that rub off with a fingernail
  • Rehaut engraving that drifts off center or sits at the wrong depth
  • End links that rattle or sit proud of the lugs
  • A date font that is too wide or sits low in the window
  • A movement that gains or loses more than 15 seconds per day after a full wind

Practical note

Buying or selling a counterfeit watch is illegal in many countries, including the United States, and customs agencies seize shipments. Use this guide to identify and evaluate what you already own or to avoid a misrepresented sale. If a listing calls a watch a 116613 without disclosing replica status, treat the claim as false until the seller provides movement, weight, and macro photos.