Short answer
The GMT-Master II 116719BLSO is a 40 mm Rolex in 18k white gold with a blue dial and a blue and black bezel. It runs calibre 3186. Rolex stopped white gold GMT-Master II production by 2019. A replica of this reference is a steel or tungsten-cased watch with a two-tone insert, a 24-hour hand, and a 24-hour bezel scale. No replica uses 18k gold.
gmt master ii 116719blso fake rolex
Reference facts
- Case: 40 mm, 18k white gold, screw-down crown and caseback, 100 m water resistance.
- Dial: blue sunray finish, applied white gold markers, Chromalight lume.
- Bezel: blue and black Cerachrom insert, 24-hour scale, numerals filled with platinum.
- Movement: calibre 3186, 31 jewels, 28,800 vph, 48-hour power reserve.
- Bracelet: Oyster with polished center links, Oysterlock clasp, 5 mm Easylink extension.
The BLSO suffix shows up in dealer and auction listings. Rolex published more material for the 116719BLRO, the white gold Pepsi. Treat the exact BLSO code as a trade convention rather than a catalog entry.
Weight and case material
18k white gold has a density of about 15.5 g/cm3. 316L steel sits near 7.98 g/cm3. A genuine white gold GMT on a full bracelet weighs about 200 g. A steel GMT-Master II weighs about 155 g. Replica cases come in two forms. Plated 316L steel lands near 150 g. Tungsten alloy lands between 190 g and 210 g. Tungsten is hard to machine, so those cases cost more and show tool marks on the lugs more often.
Bezel insert check
- Genuine: one-piece zirconium oxide ceramic. Color runs through the material. Numerals are etched, then filled with platinum.
- Top replica: ceramic insert, PVD or painted numerals, one or two pieces. Look for a seam at 6 and 18.
- Low tier: aluminum or printed insert. Color shifts toward purple or gray in daylight.
Movement check
Replica GMT movements fall into three groups: an Asia 3186 clone, an ETA 2836-2 with a GMT module, and a DG3804B. On the genuine 3186, the 24-hour hand sets in one-hour steps at the first crown position, and the date is linked to that hand. Copies differ. Test the sequence at the counter. Power reserve on the Asia clone runs 38 to 44 hours against 48 hours on the genuine 3186.
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Dial, hands and date
Genuine blue dials carry a sunray brush with a light flare across the center. Replica dials use a flat blue or a blue that reads too bright. Check the date window. The genuine cyclops magnifies 2.5x. Compare date font weight against a photo of the reference. Genuine hands are white gold with polished bevels. Painted hands look dull at an angle.
Bracelet and clasp
The white gold Oyster bracelet has polished center links and an Oysterlock clasp with a 5 mm Easylink extension. On replicas, check end link fit at the lugs, screw heads on the links, and the stamp inside the clasp. Plated center links wear through at the edges first. That wear turns a white finish into a yellow or gray patch within months.
Price bands
- Plated steel with an Asia 3186: about USD 150 to 350.
- Mid tier with a ceramic insert and an ETA clone: about USD 300 to 500.
- Tungsten case, ceramic insert, clone 3186: about USD 450 to 800.
- Genuine 116719BLRO used: about USD 30,000 to 40,000.
In the United States, importing or selling counterfeit watches falls under 18 U.S.C. 2320. Penalties include fines and prison time. Rules on ownership differ by country.
What no replica matches
Caseback and clasp hallmarks, 18k assay marks, movement finishing, spring bar quality, and the color depth of a genuine Cerachrom insert. Weight comes close on tungsten cases alone, and the balance point still shifts toward the case. Service is the other gap. Parts for a clone 3186 come from the same sellers as the watch, and few watchmakers keep them in stock.