The reference 126617LB does not appear in any Rolex catalog. It exists almost entirely in replica listings, where sellers use it to describe a two-tone yellow gold and steel Submariner Date 41 with a blue dial and blue bezel insert. The genuine watch that label is imitating is the 126613LB, a Rolesor model in steel and 18k yellow gold. A white gold sibling, the 126619LB, shares the blue dial but not the bracelet. If you are judging a fake sold as 126617LB, compare it against the 126613LB specification: 41 mm case, blue sunburst dial, blue Cerachrom bezel, Oyster bracelet with gold center links. This guide is a comparison framework. Selling counterfeit watches is illegal in the United States and most of Europe, so treat the checks below as a way to assess quality, not a purchase recommendation.
What the label is really describing
Sellers picked up "126617LB" because it sits between the real steel-and-gold and white-gold references and sounds plausible. The build behind the label is consistent: a 41 mm Oyster case, a yellow gold bezel holding a blue ceramic insert, a blue dial with gold-tone applied markers, and a three-link bracelet with gold center links. Any listing that shows a steel bezel, a black dial, or a fully gold case under this reference is mislabelled, and that alone tells you the seller is not tracking details.
Case and bezel checks
- Lug profile: the 126613LB has slim, tapering lugs. Replicas often leave them thick and slab-sided.
- Crown guards: they should flow out of the case without a visible seam or tooling mark.
- Bezel action: a genuine unidirectional bezel turns with 60 defined clicks and no back play. Count them.
- Insert color: blue ceramic should shift from deep navy to near-black at angles. Flat, painted-looking blue is a warning sign.
- Pip alignment: the luminous triangle at 12 should sit centered over the dial marker.
Dial, hands, and date
The dial is where two-tone replicas usually fail. Look for a sunburst finish that changes tone as you tilt the watch, applied markers with clean gold surrounds and no glue bleed, and printing that stays sharp under a loupe. The date should magnify roughly 2.5 times through the cyclops and sit centered in the window. Check the rehaut engraving for even spacing and depth. A dull dial with a flat finish and a weak date magnifier is the most common flaw on budget builds of this reference.
Bracelet and clasp
The Oyster bracelet on the genuine watch uses solid links with gold center links and a Glidelock extension clasp. Run a fingertip along the bracelet edges; sharp corners and loose pivots show up fast. Open the clasp and look at the inner folding blades: they should be stamped, not laser-etched, and the safety catch should snap without rattling. Sizing screws should thread cleanly and sit flush with the link sides.
Movement and winding
Ask what movement is inside and whether the seller will confirm the power reserve in writing. Wind the crown slowly and feel for grit. Set the time and check that the hands move without stutter, then set the date and confirm it flips cleanly near midnight rather than dragging through the change. A sweeping seconds hand at six to eight beats per second is normal for the clone movements used in these builds; a ticking hand at one beat per second means a cheap quartz module.
Water resistance and seals
Most replica Submariners are assembled without pressure testing. Treat any water resistance claim as unverified until the case has been tested. Ask whether the caseback gasket and crown tube seals were fitted and whether a dry pressure test was performed. If the answer is vague, keep the watch away from water entirely.
Step-by-step inspection routine
- Confirm which genuine reference the watch is copying, then pull the official specification for that reference.
- Measure the case across the lugs with calipers and confirm it reads 41 mm.
- Tilt the dial under a desk lamp and watch for a sunburst shift across the blue surface.
- Check the date window magnification and centering against a known reference photo.
- Rotate the bezel through a full turn and count the clicks.
- Open the clasp and inspect the inner blade stamping and the safety catch.
- Wind and set the watch, then watch the date change through a full 24-hour cycle.
- Request a written return policy and a pressure test result before any payment.