Short answer
The Datejust 115234 is a 36mm Rolex built through most of the 2000s, and it is one of the most copied watches around. A replica of it lives or dies on three things: the bezel, the dial printing, and the movement. Get those right and the watch reads correctly at arm's length. Get them wrong and no amount of polishing saves it. If you are comparing sellers, start with bezel material, then the date window, then the movement's beat rate. Those checks catch most bad copies before you ever look at a lume plot.
What the genuine 115234 actually is
Knowing the original spec is the only honest way to judge a copy. In plain terms:
- 36mm Oystersteel case, roughly 11.7mm thick, smooth caseband, no crown guards
- 18k white gold fluted bezel, a solid gold part rather than a plated one
- Rolex calibre 3135, automatic, 31 jewels, 28,800 vph, about 48 hours of power reserve, COSC certified
- Sapphire crystal with a Cyclops lens over the date at 3 o'clock, 2.5x magnification
- 100m water resistance, Twinlock crown
- Oyster or Jubilee bracelet, solid end links, folding clasp
- Sunburst or flat dials, Roman or stick markers, "Swiss Made" printed at 6 o'clock
The reference gave way to the 1162xx generation in the late 2000s, so anything sold as a new old stock 115234 deserves a close look at the serial and the bracelet code.
Where the fakes show themselves
The bezel
This is the single best tell. The genuine fluted bezel is solid 18k white gold, cut with sharp ridges and a bright, faintly warm polish. Almost every replica uses gold plated steel or brass. Under indoor light the plating looks flat, and after a year of wear the high points go yellow or gray. Run a fingernail along the flutes: genuine edges catch cleanly, plated ones feel rounded and soft.
Dial and date
Print quality is the second tell. Look at the coronet at 12 and the wordmark under it: genuine dials are pad printed with hard edges, no bleeding, no thick serifs. At the date, check the window bevel and the magnification. The lens should enlarge the date about 2.5 times and carry a faint blue anti-reflective tint. A magnifier that leaves the date looking small, or a date wheel with a fat, wrong font, ends the conversation.
Case, bracelet and clasp
Genuine end links sit flush to the case with almost no gap. Replicas often show a hairline step there. The clasp crown should be crisp rather than muddied, and the bracelet should taper the way Rolex tapers. Case backs on a Datejust are plain, so engraving or a display window means someone got creative.
The movement is the expensive part
A real 3135 runs at 28,800 vibrations per hour. Many replicas use an ETA 2824 clone, a Miyota, or a Chinese automatic at 21,600 vph. You hear the difference on a timegrapher and often see it in a seconds hand that stutters. Some higher end copies now ship a "3135 clone" with a decorated rotor and the correct beat rate. Those look closer on a bench, but the finishing, the reversing wheels, and the date change still will not match a serviced original. Assume any replica needs service eventually, and that plenty of watchmakers will refuse to touch it.
What I check, in order
- Bezel material and edge sharpness
- Cyclops magnification and date font
- Dial print under a loupe
- End link fit and clasp stamping
- Beat rate on a timegrapher, if the seller will show one
Price and the legal side
Most replicas of this reference sell somewhere between roughly $300 and $600, with the better finished ones at the top of that range. Counterfeit watches are illegal to import and sell in the United States, and Customs seizes shipments when it finds them. That does not stop the market, but it does mean you are dealing with sellers who offer no recourse if the watch arrives wrong and no service network behind the product. A replica can look convincing on a wrist. It is still not a Rolex.