The fastest way to spot a fake Rolex GMT-Master II 16710 is to test the GMT hand. On a genuine watch running the caliber 3185 or the later 3186, the 24-hour arrow hand jumps in crisp one-hour steps when you turn the crown in the second position. Most replicas use a modified ETA or Chinese movement where the arrow hand only trails the minute hand and never jumps on its own.
Why is reference 16710 so widely faked?
The 16710 was built from 1989 to 2007, which makes it one of the longest-running GMT-Master II references and one of the most copied. It uses a 40mm Oyster case, an aluminum bezel insert, and a sapphire crystal, all of which are easy to imitate at a glance. Because it is an older steel sports Rolex, buyers often shop without papers, which gives fakes room to hide.
fake rolex gmt master ii 16710 for sale
How do I check the case and lug shape?
A genuine 16710 measures 40mm across the bezel, roughly 12.5mm thick, with a 20mm lug width. Replica cases are often 1mm to 2mm too thick or carry lugs that taper too sharply toward the spring bars.
- Crown guards should flow into the case with a soft curve, not a square block.
- Earlier examples have drilled lug holes, which Rolex phased out around 2003.
- The caseback is plain steel with no display window. A glass caseback is an instant fake.
- The reference number and serial sit between the lugs at 12 and 6, stamped cleanly.
What dial details give a fake away?
Print quality is where most replicas fail under a loupe. Genuine dial text is crisp and level, with even spacing between GMT-MASTER II and the coronet above it, and the five points of the crown are sharp and symmetrical.
The lume plots date the watch. Tritium dials marked SWISS - T < 25 appear on earlier 16710 examples, while later watches carry Super-Luminova plots and a SWISS MADE signature at 6 o'clock. Fakes frequently mix these, printing a T signature on dials with modern white lume.
Check the date wheel too. The font should match the era, and the date should sit centered in the window with even magnification.
How should the GMT hand and crown behave?
Pull the crown to the second position and rotate it. On a genuine caliber 3185 or the 3186 fitted to the last 16710 examples, the 24-hour hand advances in distinct one-hour clicks while the minute hand stays put.
Then push the crown in and check the time-setting and winding feel. Genuine Rolex crowns turn smoothly with light resistance, while many replicas feel gritty or spin too freely.
What should the bezel insert look like?
Original inserts are thin anodized aluminum, not ceramic, so they should show slight fading or scratches on older watches. The 24 numerals are sharp and evenly spaced, and the triangle pip lines up dead center at 12 o'clock.
Rotation should be bidirectional with 24 crisp clicks. A bezel that wobbles, turns too easily, or clicks more than 24 times is a warning sign.
Does the crystal and cyclops look right?
Genuine sapphire should look clear with no blue anti-reflective tint, and the cyclops should magnify the date about 2.5 times. Replica crystals often show a purple or blue glare under light or use a weaker magnifier.
Some later 16710 crystals carry a laser-etched coronet at 6 o'clock, visible only at a sharp angle under bright light. A coronet you can see head-on from arm's length is wrong.
What about the bracelet, clasp, and engravings?
The 16710 came on an Oyster bracelet with hollow end links on early examples and solid end links on later ones, plus a stamped clasp code that matches the production period. Look for a sharp coronet on the clasp, even link gaps, and screws that sit flush.
Weigh the watch in your hand. A genuine 16710 on a full bracelet lands in the range of a real steel sports Rolex, while replicas often feel light or oddly front-heavy.
Quick checklist before you buy
- Test the jumping GMT hand in the second crown position.
- Measure the case at 40mm and confirm the 20mm lug width.
- Compare dial text, coronet shape, and lume era under a loupe.
- Check the bezel for 24 bidirectional clicks and an aluminum insert.
- Inspect the crystal for tint, magnification, and an over-visible coronet.
- Verify clasp codes and bracelet end link type.
Can a replica 16710 pass a pressure test?
Some high-end fakes can hold a basic water test, so passing one proves very little on its own. Treat pressure results as a supporting detail, not as proof of authenticity.
Should I ever buy a 16710 without papers?
Yes, plenty of genuine vintage examples lost their paperwork decades ago. When papers are missing, have the watch opened by a watchmaker who can confirm the movement, and ask for service history before you pay.