Answer first: the replica Rolex 278273 is a copy of the two-tone Datejust 31, a 31 mm steel and Everose gold watch with a fluted or smooth bezel, a Jubilee or Oyster bracelet, and a small dial that leaves nowhere to hide. Most replicas get the overall look right at arm's length. The gap shows up in the details. Case profile, bezel flute count, gold tone, dial printing, bracelet fit and movement are what separate a decent copy from a bad one.
What the 278273 actually is
The genuine reference is a Datejust 31 in Oystersteel and Everose gold, powered by the calibre 2236. That matters because replica makers copy the outside first and the inside last. If a seller quotes a 36 mm or 41 mm case for a "278273", the watch is the wrong model. The 278273 is 31 mm, full stop.
Case and bezel
I look at the lugs first. On good copies the lugs taper cleanly into the case and the polished flank has a soft transition, not a sharp step. The fluted bezel is the second test. Count the flutes against a photo of the real thing and check whether the ridges are cut or stamped. Stamped flutes look flat, and they catch light in a dull, even way.
- Case should measure close to 31 mm across, excluding the crown
- Lug width near 16 mm, which is what the bracelet needs
- Fluted bezel flutes should be crisp and evenly spaced
- Caseback engraving should sit inside the case outline, not wander
Gold color and plating
Everose is a warm pink gold, not yellow and not copper. Cheap replicas push it too red or too brassy, and the tone shifts under daylight. Ask how thick the plating is. Thin plating wears through on the crown, the bezel edges and the clasp within months. Solid gold replicas exist but they cost far more and are rare in this reference.
Dial and markers
The dial is where the 31 mm size hurts bad copies. Printing gets muddy, the date window sits slightly off center, and diamond markers look like glass chips. Real diamond-set replicas usually use lab stones or CZ, and the setting quality matters more than the stone. Check that each marker sits level and that the date magnification is close to 2.5x.
Bracelet and clasp
Two-tone Jubilee links should flex without rattling. Run a fingernail along the center links and feel for sharp edges. The clasp should close with a solid click and the crown logo should be raised, not printed. Sizing screws should be proper threaded screws, not push pins.
Movement and feel
Most replicas in this size use a decorated Asian automatic, often a 2671-based unit or a 2824 clone. A few higher-tier builds use a clone of the 2236. Ask for the movement name, the beat rate and the power reserve. A genuine 278273 on a full bracelet weighs roughly 90 to 100 grams depending on links. If a seller cannot tell you the weight, they probably have not handled the watch.
Price tiers
Entry copies run under $150 and look wrong up close. Mid tier sits around $250 to $400 with better plating and a sharper bezel. Top-tier builds with clone movements and real diamond markers go higher. Pay for the case and bracelet first, movement second.
Legal and practical notes
Counterfeit watches are illegal to import into the US and most of the EU, and selling one as genuine is trademark fraud. A replica is a replica. Wear it as one, and never let a buyer believe otherwise.