Short answer
33661 is the case reference stamped on the back of the 42 mm steel Cartier Ballon Bleu de Cartier. The full model number changes with the bracelet or strap fitted at the factory. A replica sold as a Ballon Bleu 33661 copies the 42 mm case, the fluted crown, and the blue cabochon. Copies differ from the genuine watch in four places: case thickness, crown stone, dial print, and movement. Those four points set the price.
Genuine specifications
- Case: steel, 42 mm across, about 13 mm thick.
- Crystal: sapphire, domed.
- Crown: fluted, set with a blue synthetic spinel cabochon.
- Movement: Cartier calibre 049, automatic, based on the ETA 2892-A2, 28,800 vibrations per hour, about 42 hours of power reserve.
- Dial: silvered, Roman numerals, blued steel sword hands, date at 3 o'clock.
- Water resistance: 30 m.
- Case back: engraved with 33661, a model code, and a serial number.
Where replicas diverge
Case and thickness
Measure the case with calipers. Genuine 42 mm Ballon Bleu cases sit near 13 mm. Many replicas run 14 mm to 15 mm. The extra depth changes how the watch sits on the wrist and how the crown guard reads from the side.
Speedmaster and Ballon Bleu Replica Cost: What 33661 Means
Crown and cabochon
The genuine stone is a domed synthetic spinel with a dark blue tone. Replicas use glass, plastic, or low-grade stone. Flat tops and pale blue color are common faults. Fluting on the crown should be cut, not cast.
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Dial
Check the Roman numeral VII, the weight of the CARTIER print, and the SWISS MADE line at 6 o'clock. Replica dials show thicker print and a date window that sits off center. The genuine date aperture sits under a small magnifier.
Movement
Calibre 049 sweeps at 28,800 vibrations per hour, eight beats per second. Quartz copies tick once per second. Automatic copies use clones of the ETA 2892 or 2824, or a Miyota. Rotor engraving on copies is shallow in most examples.
Checks worth doing
- Measure thickness and lug width with calipers.
- Set the time and watch the date flip. It should change within a few minutes of midnight, not over an hour.
- Listen to the beat. Eight ticks per second points to a mechanical movement.
- Inspect the case back engraving under a loupe. Laser etching looks shallow and grey next to stamped text.
- Weigh the head. A 42 mm steel case has mass. Light cases point to plated alloy.
Price and service
Prices for a 42 mm Ballon Bleu replica run from about 80 USD for quartz to 500 USD and up for a clone movement with a decorated rotor. Servicing a clone movement costs 60 USD to 150 USD at an independent watchmaker. Cartier does not service replicas, and no Cartier boutique will authenticate one.
What is not known
Cartier does not publish a table that maps case reference 33661 to production years or to each bracelet variant. Statements about exact production runs come from dealers, not from the brand. Treat them as unverified.