The Rolex Submariner 116619LB is a 40 mm dive watch in 18k white gold, with a blue dial and a blue ceramic bezel. Rolex sold it from 2008 to 2020. Retail at the end of the run was about $36,000. A replica of this reference is almost always stainless steel, not gold. That difference shows in weight, hallmarks, and movement.

What the Reference Numbers Mean

The letters LB stand for lunette bleue, or blue bezel. Case diameter is 40 mm. Thickness is 13 mm. Lug width is 20 mm. Water resistance is rated at 300 m. The crystal is sapphire with a cyclops over the date. The bracelet is an Oyster with a Glidelock clasp. Movement is calibre 3135: 31 jewels, 28,800 vph, about 48 hours of power reserve, quickset date, hacking seconds.

Rolex ended the 116619LB in 2020 and replaced it with the 126619LB, which uses calibre 3235 and a 41 mm case. Both carry the Smurf nickname in the collector market.

Where a Replica Diverges

Weight

Steel and 18k gold do not weigh the same. A steel Submariner on a full bracelet runs about 150 g. The 116619LB runs about 220 g. A replica in 316L or 904L steel lands near 155 g. Sellers who plate the steel add grams, not tens of grams. A postal scale is the fastest check.

Metal and Hallmarks

White gold is a warm gray. It is not chrome bright. Rolex stamps the case, the caseback, the clasp, and each bracelet end link. Look for the 750 stamp and the Rolex crown hallmark. Gold-plated replicas show copper or brass at the edges after wear. Plating rubs off at the clasp and the lugs first.

Bezel

The genuine blue Cerachrom insert has numerals filled with platinum by a PVD process. The numbers sit in the ceramic, not on it. Most replica inserts use paint or a thin coat. The blue hue shifts too. The genuine insert reads dark navy in low light.

Dial and Crystal

Genuine hour markers are white gold with lume plots. The rehaut carries ROLEXROLEXROLEX engraving and a serial at 6 o'clock. The sapphire crystal has a laser-etched crown at 6 o'clock, visible at 10x magnification. Replica dials often use the wrong font weight on the word SUBMARINER.

Movement

A real 116619LB runs calibre 3135. Replicas use a 3135 clone, an ETA 2824 copy, or an Asian 2836. Open the caseback and check the rotor engraving. Genuine 3135 plates show Geneva stripes and perlage, and the balance beats at 28,800 vph.

Price and Legal Status

Used 116619LB watches trade between $35,000 and $45,000, based on box, papers, and condition. Replica listings run from $200 to $800. US law treats the sale of counterfeit watches as trademark infringement. 18 U.S.C. 2320 covers trafficking in counterfeit goods. Customs and Border Protection can seize imports.