Quick answer
A replica Rolex GMT-Master II Batman sits right when the 40 mm case rests just behind the wrist bone, one finger slides under the clasp, and the blue and black bezel triangle aligns at 12 o'clock. Size the bracelet first, then check bezel action, crown threads, and the GMT hand before a full day of wear.
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Before you start
- Soft cloth and a small bracelet sizing tool or screwdriver set.
- Reference photo of ref. 126710BLNR or ref. 116710BLNR for bezel and dial detail.
- Phone clock set to a known time zone.
- Flat surface with a towel to catch spring bars.
Procedure
Set the bracelet size. Remove links from the 12 o'clock side first if the watch head tips toward you, and keep the clasp centered under the wrist.
Place the case behind the wrist bone. Move the watch head back from the hand so the crown does not press into the back of the hand when you bend the wrist.
Check the bezel alignment. Turn the bezel through one full click cycle and stop when the triangle sits at 12 o'clock.
Wind and set the watch. Unscrew the crown, wind 30 to 40 turns, then set local time and the 24-hour hand.
Test the GMT hand against a reference clock. Set the 24-hour hand to a second time zone and compare it with the phone clock after 60 minutes.
Wear it for a two-hour trial. Keep the bracelet loose enough to move, then check for red marks or clasp bite on the wrist.
On-wrist checks
Look at the watch from arm's length. The lugs should not overhang the flat top of the wrist, and the bracelet should curve down without a gap at the end links. A Batman bezel shows a sharp split between blue and black; a weak split or a dull cerachrom ring is a sign of a low-grade replica. Check the date window at 3 o'clock, the cyclops magnifier, and the rehaut engraving under a lamp.
Care and limits
Wipe the case and bracelet with a soft cloth after wear. Keep the crown screwed down before contact with water, and do not trust a replica to match the 100 m rating of a genuine GMT-Master II. A replica is not a genuine Rolex; do not sell it or present it as one.