The short answer
The 116719BLSO is the white gold GMT-Master II with a blue dial and a blue and black ceramic bezel. A good copy gets three things right: the 40mm case shape, a sharp color split on the bezel, and the sunburst finish on the dial. A bad one shows flat blue paint, a soft bezel transition, and a date sitting under a weak magnifier. Because the original is solid 18k white gold, no steel replica will feel like it. Treat weight as the one thing you can never fix, and judge everything else on close inspection.
What the reference actually is
This sits in the white gold branch of the GMT-Master II family. You get a 40mm Oyster case in 18k white gold, a blue sunburst dial, a Cerachrom insert split blue over black, an Oyster bracelet with polished center links, caliber 3186, 100 meters of water resistance, and a 24-hour hand. The reference was discontinued, and that is part of why copies of it stayed in demand. Buyers want the look without the five-figure gold price.
Where copies get it wrong
The bezel split
The genuine insert takes its color through the ceramic itself, and the numerals get a platinum coating. Cheap copies use painted alloy or a printed sticker. Look at the transition at 6 and 18 o'clock. It should be a clean vertical line with no bleed. The blue should read deep navy, not purple and not royal blue. The numerals should have slight relief so light catches them instead of sitting flat like ink.
gmt master ii 116719blso replica
The dial
A sunburst dial changes with the light. In shade it goes deep navy; in direct sun it lights up and radiates outward from the center. Flat copies look identical in every lighting condition, which is the fastest tell there is. Check the printed text under the coronet: small, sharp, evenly spaced. Rehaut engraving should be shallow and consistent, not gouged. The date window needs a smooth bevel, and the cyclops should magnify about 2.5x with the date centered.
Case, lugs, and crown guards
The crown guards taper forward, the lug tops carry brushing while the case sides are polished, and the end links should sit flush with no gap. A 116719BLSO copy that measures much past 12.5mm thick will look wrong on the wrist even to someone who does not know the reference. Ask for a caliper photo if you can.
Movement
The real caliber 3186 lets the hour hand jump in one-hour steps while the GMT hand stays put. Test that. Plenty of budget copies run an ETA-style GMT setup where the 24-hour hand is tied to the minute hand, so setting the time drags the GMT hand along with it. Also check the crown: it should screw down in three or four smooth turns, with no grit.
Weight, the problem nobody solves
White gold is dense, close to 18 g/cm3 against steel at about 7.8. A genuine example on the bracelet lands somewhere around 190 to 200 grams. A steel copy usually sits between 140 and 160 grams. Gold-plated versions feel closer, but the plating wears through at the clasp and the lugs. If a seller says the watch is solid white gold at a replica price, that is a lie.
Price tiers
- Under $150: sticker or painted bezel, flat dial, GMT function done wrong. Fine as a novelty, not as a stand-in.
- $250 to $400: real ceramic insert with a decent color split, sunburst dial, a 2836 or 2824 GMT base. The sensible spot for most buyers.
- $450 to $700: 1:1 territory. Clone 3186 with a jumping hour hand, matched dial and hands, tight end link fit, correct date magnification. This is where a 116719BLSO copy starts looking convincing in person.
Quick QC checklist
- Bezel split line at 6 and 18, straight and clean.
- Dial finish checked in shade and in direct sun.
- Date centered under the cyclops, no distortion.
- Hour hand jumps in one-hour steps.
- End links flush, no rattle in the clasp.
- Crown screws down in three or four turns.
- Weight in hand, weighed against a steel GMT-Master II if you can.
Before you pay
A copy is a copy. It is not a Rolex, it carries no Rolex warranty, and no box or papers change that. Do not pay genuine money for one, do not buy from a listing that claims it is real, and never resell it as genuine. Buy from a seller who shows photos of the exact watch rather than factory stock images, and ask for a short video of the date flipping and the GMT hand being set. If you plan to swim with it, have the case pressure tested first, because water resistance on any replica is a coin flip.