The short answer
Cartier's Ballon Bleu "extra large" is the 46 mm case, and it is the least replicated size in the line. Most factories build the 33 mm and 36 mm because those sell in volume. If you want a 46 mm replica, you are shopping a smaller pool: a handful of mid-tier makers, a couple of better builds, and plenty of generic listings reusing the same catalog photos. Good examples exist. Finding one just takes more checking, because the extra dial and case area gives every flaw more room to show.
Why the 46 mm is harder to get right
Scale works against a replica here. A 46 mm bezel has a long, slow curve, and that curve is either right or it is not. The genuine watch flows from case into lugs with almost no visible joint, a fluted crown sits sunk inside a protective guard, and a domed blue cabochon caps the crown. On a 36 mm copy those details hide in a few millimeters. At 46 mm they sit in daylight. The genuine case is also thin for its size, so a replica that looks like a puck on the wrist is an easy tell.
Case and finishing
Start at the transition from caseband to bezel. Steel Ballon Bleu cases are mostly polished, so run a finger along the curve and look for hazy patches, soft edges, or machining lines that catch light at an angle. The caseback should sit flush with no gap you can slide a fingernail into.
Crown, guard, and cabochon
The cabochon is the giveaway. Genuine uses a synthetic blue spinel, domed and seated cleanly in the crown. Cheap replicas use plastic or dyed glass, cut flat, sometimes glued slightly crooked. The crown guard should read as a smooth continuation of the case, not a block that looks welded on.
Dial and hands
- Guilloché: concentric and textured, not printed. Tilt the watch under a lamp and check for depth.
- Roman numerals: crisp black strokes with no blur at the edges. Some Ballon Bleu dials hide a micro-signed "Cartier" inside the VII numeral, so a loupe is worth the ten dollars.
- Hands: blued steel sword shape, evenly finished, with a date window that matches the dial tone rather than a stark white wheel.
Movement and thickness
At this size most replicas run an Asian 2824 clone or a Miyota 9015 dropped into a spacer ring. That spacer is why some 46 mm copies rattle when you tap the case. Ask which movement is inside, and ask for a timegrapher readout plus caliper photos of the thickness. "Swiss movement" at this price is a claim, not a fact, until someone shows you the rotor.
Wearability
46 mm with a low profile and short lugs wears big. Measure your wrist with a tape before you commit. Under about 6.75 inches, the case will overhang, and that is a fit problem no upgrade fixes.
Questions I would ask before paying
- Which maker or factory, and what version number?
- What exact movement, and can you send a photo of it running?
- Are these QC photos of the actual watch, or catalog images?
- What is the measured case thickness?
- Does payment go through a method with buyer protection?
Rough price bands
- $120 to $250: generic builds, printed dial texture, plastic cabochon.
- $250 to $450: mid-tier, decent case curve, 2824 clone, real QC photos.
- $450 and up: the better builds, often made to order with a wait.
Red flags
- Catalog photos only, no live shots.
- "1:1 Swiss" with no movement details.
- A price far under the band for a claimed top-tier build.
- A seller who dodges questions about thickness or movement.
Bottom line
The 46 mm Ballon Bleu replica is a niche within a niche. Judge the case curve first, the cabochon second, then the dial texture, then the movement. If a seller cannot answer basic spec questions, move on. One practical note for buyers in the US: selling or shipping counterfeit goods is illegal and customs can seize a parcel, so know the risk before you pay.