The short answer: 33687 is not a Cartier reference number. Ballon Bleu references follow an alphanumeric pattern such as W69012Z4, W6920046, or WSBB0049. A bare five digit number is a seller code or a marketplace listing ID, and it tells you nothing verifiable about the watch in the box. Below is how these listings are assembled, four things that give a counterfeit away on the watch itself, and a cost comparison against a pre-owned genuine piece.
What the number 33687 actually is
Because the code does not map to any catalog entry, case size, metal, dial color, and movement are all whatever the seller claims. Two listings using the same number can ship two different watches. When a buyer complains, the seller retires the number, opens a new listing, and the complaint does not follow. That structure is the largest risk in this category, larger than any cosmetic difference.
Criterion 1: case shape and crown
The Ballon Bleu case is a rounded pebble profile, and the crown guard appears to grow out of the caseband with the blue cabochon set flush inside it. Counterfeits tend to show flat flanks, a thicker bezel, and a cabochon set high on a stub. On steel models the hands should be blued steel, not painted blue.
Criterion 2: dial printing and texture
Look at the guilloche under a loupe. Genuine dials hold a concentric pattern that stays sharp toward the center. Copies show a soft or uneven pattern and a visible break where the date window was stamped. Lettering should be crisp with clean serifs. Fuzzy edges, a squashed Roman VII, or a skewed Swiss Made line at 6 are common on replicas.
Criterion 3: caseback and movement
Genuine engraving is deep and even with a readable serial and reference. Replica engraving is shallow, laser marked, and often misspells the model name. The movement is the harder tell. Modern Ballon Bleu automatics use Cartier in house calibers, while replicas use generic or cloned movements. A rattling rotor, a low beat rate, or a date that flips at noon points to a copy.
Criterion 4: water resistance and service
Case gaskets are where replicas save the most money. A claimed 30 or 50 meters is not tested, and moisture reaches the movement through a crown that does not seal. No authorized service center will touch a counterfeit, and many independent watchmakers refuse them because parts are not available.
Option A: buying the replica
Pros
- Low purchase price compared with a genuine Ballon Bleu
- Reads as the right watch from across a room
- No waiting list and no dealer relationship required
Cons
- Trafficking in counterfeit goods is illegal in the United States, and imported shipments can be seized by customs
- No warranty, no service, and no parts supply
- Water resistance is nominal, so the watch is a splash only object
- Resale value near zero, and reselling exposes the seller to enforcement
Option B: buying pre-owned genuine
Pros
- Legal to buy, own, and resell
- Cartier service centers can maintain it, and parts exist
- The reference number can be verified against the caseback, papers, and service records
- Holds a resale market, so the true cost of ownership is the spread between purchase and sale
Cons
- Higher upfront price and a wider search
- Requires a check of papers, service history, and case condition
- Pre-owned stock in a specific size and dial can be thin
Which buyer fits which choice
If the goal is the look of a rounded dress watch at the lowest entry price and the watch will never see water, a legal homage from an independent brand does the same job as the replica without the seizure risk or the dead service path. If the goal is a watch to wear daily, swim in, and pass on, a pre-owned genuine Ballon Bleu is the only option that survives all three. The replica wins on one line, the purchase price, and loses on legality, service, water resistance, and resale. That is not a close comparison.