The 278271 either passes or fails an authenticity check in about a minute, and the failures are predictable. Fake versions of this reference miss the same three things at once: the weight of the Everose gold, the date window under the cyclops, and the finish of the rehaut engraving. If all three hold up, the watch has earned a closer look from a watchmaker before any money changes hands.
What the 278271 is supposed to be
The 278271 is a Datejust 31 in Oystersteel and Everose gold. Case size is 31mm, water resistance is 100 meters, the crystal is sapphire with a Cyclops lens over the date, and inside sits the calibre 2236, the movement with a Syloxi silicon hairspring and a 55-hour power reserve. The fluted bezel and the center links of the bracelet are solid 18k Everose gold. That spec sheet matters because most fakes are built from a generic 31mm case and a stock automatic movement, and the gaps show up exactly where the real watch uses expensive material.
Fake Rolex 278271 Comparison: Top Replicas at a Glance
The 60-second screen
- Weight. Gold is roughly twice as dense as steel. A genuine two-tone Datejust 31 with a full bracelet sits in the ballpark of 95 to 100 grams. Fakes with plated center links and a plated bezel come in lighter, and the gap is bigger than most people expect. Hold it next to a steel 31mm piece and the difference is obvious in hand.
- The cyclops and the date. Rolex uses 2.5x magnification and applies the anti-reflective coating under the crystal, not on top of it. The date should read clean and slightly enlarged, with low glare. Fake crystals often magnify 1.5x to 2x, and the date font is a touch too bold or the numeral sits off center.
- The laser coronet at 6. There is an etched crown at the 6 o'clock position on the sapphire. It is tiny, has five points, and you need a 10x loupe plus angled light to catch it. Fakes either skip it or etch something too large and too easy to see.
Dial, hands, and printing
Read the text first. ROLEX and OYSTER PERPETUAL DATEJUST are printed with a thin, sharp serif, and the spacing between lines stays consistent. Counterfeit dials tend to run bold and slightly crowded. The sunburst finish on a real dial shifts smoothly from dark to bright as you rotate it, while fakes often look flat or patchy. The Everose hour markers and hands are solid gold with polished facets, so they flash light in a hard, defined way instead of a soft shine. The seconds hand should sweep, and a 2236 beats at 28,800 vibrations per hour, four ticks per second, though that alone proves nothing because clone movements do the same.
Case, rehaut, and serials
The rehaut is the inner lip between dial and crystal, and Rolex engraves ROLEX ROLEX ROLEX around it with the serial at 6 o'clock. The engraving should be crisp, evenly spaced, and aligned with the minute track. Fakes are usually shallow, uneven, or the wrong height. The model number sits between the lugs at 12 o'clock under the bracelet end link, so fold the bracelet back to see it. On a genuine watch it is cleanly stamped and matches the reference on the card. The crown is a Twinlock with a fluted profile, and it should screw down smoothly and land with the coronet upright when tight.
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Bracelet and clasp
On a Jubilee, only the center links are Everose gold on this reference. End links should sit against the case with no gaps and no rattle. The clasp closes with one firm click, and the coronet on the clasp is stamped deep. Check the Easylink extension, the 5mm fold-out link that many fakes leave out or copy badly. Older Rolex models carried a hologram sticker on the caseback. The 278271 does not, so a seller using one as proof of authenticity is proving the opposite.
Paperwork and the paper trail
Rolex warranty cards changed over the years, and the card should match the production era of the watch. Serials on the card must match the engraving on the rehaut. Boxes, booklets, and hang tags get copied well these days, so treat them as supporting evidence and never as proof. A receipt from an authorized dealer is worth more than a full box set from an unknown seller.
How to get a real answer
Any independent watchmaker who services Rolex can open the caseback in minutes. Inside you want the calibre 2236 marking, a free-sprung balance with Microstella regulating screws, and finishing that looks industrial but precise. A fake typically shows a regulator arm or an undecorated clone. Rolex service centers will not issue authentication letters, but they do refuse to service counterfeits, so a completed service is a strong signal. If the seller will not allow an inspection by your watchmaker, that is your answer.