Quick Answer

The Rolex Sea-Dweller 126600 is a 43 mm steel dive watch rated to 1,220 m. Rolex released it in 2017, the 50th year of the Sea-Dweller line. Replicas of the 126600 sell in several grades. The gaps between them show up in four places: case thickness, the date magnifier, the ceramic bezel insert, and the movement inside.

Genuine 126600 Specs

  • Reference 126600. Introduced at Baselworld in March 2017.
  • Case: 43 mm Oystersteel, monobloc middle case, screw-down case back and crown.
  • Water resistance: 1,220 m (4,000 ft). Helium escape valve at 9 o'clock on the case flank.
  • Bezel: unidirectional, 60-minute graduation, black Cerachrom ceramic insert, platinum-coated numerals.
  • Crystal: sapphire with a Cyclops lens over the date at 3 o'clock. Anti-reflective coating sits under the lens.
  • Dial: black, Chromalight markers, "Sea-Dweller" printed in red below the coronet.
  • Movement: Rolex caliber 3235, automatic, Chronergy escapement, 31 jewels, 28,800 vph, 70-hour power reserve.
  • Bracelet: Oyster three-piece links, Oysterlock clasp, Glidelock extension, Fliplock.
  • US retail at launch: $11,350. Rolex has raised the price since.

What Changed From Older Sea-Dwellers

The 116600 ran 40 mm. The 126600 moved to 43 mm and added the Cyclops lens, which the Deepsea and older Sea-Dwellers do not carry. It brought back red dial text, last seen on the ref 1665 in the 1970s. The movement changed from the 3135 to the 3235, and the power reserve went from 48 hours to 70.

Checks For Replica 126600 Watches

  1. Case diameter. Measure with calipers across the case at 9 and 3, crown excluded. Many replicas run 42 mm or 44 mm.
  2. Case thickness. The real case sits near 15 mm. Thin cases point to a smaller movement and a spacer ring.
  3. Cyclops magnification. The lens magnifies the date about 2.5 times. Compare date size against a known reference.
  4. Cyclops alignment. View the date window from the side. The lens should center over the window with no offset.
  5. Bezel insert. The insert should be ceramic, not painted aluminum or print. Numeral edges should be clean at 10x magnification.
  6. Pip at 12. The lume dot should sit flush in the ceramic and glow blue under UV.
  7. Dial text. "Sea-Dweller" in red, "OYSTER PERPETUAL" and "DATE" above center. Font weight and spacing differ between factories.
  8. Date wheel. The date font has flat openings and set serifs. Check the "1" and the "4".
  9. Helium escape valve. Located at 9 o'clock. It should sit flush with the case flank and show no gap.
  10. Bracelet fit. Solid end links should sit flush against the lugs with no gaps or rattle.
  11. Glidelock and Fliplock. Test the clasp action. The Glidelock slide adjusts in 2 mm steps.
  12. Weight. A full-length steel Oyster bracelet plus head lands near 170 g to 180 g. Fewer links reduce the figure.
  13. Rehaut engraving. "ROLEX" repeats around the inner flange and lines up with the markers on real examples.

Movement Options In Replicas

Replica 126600 cases hold one of three movements. The first is a 2824 or 2836 clone from Asia, running 28,800 vph with a 38 to 40 hour reserve. The second is a 3235 clone sold as SH3235 or VR3235, which copies the bridge layout of the Rolex design. The third is a Swiss ETA or Sellita. No replica case takes a real Rolex 3235. Builders cut the case, crown tube, and date wheel to fit the clone.

Points To Confirm Before Buying

Ask the seller for the movement name, the case diameter in millimeters, and the water resistance rating. Most replica 126600 watches have gaskets but no pressure test. Do not dive with one. Service intervals on clone movements run shorter than on a real 3235. Three to five years is a common range. Case metal is 316L stainless steel in most replicas, not the 904L alloy Rolex calls Oystersteel.