Our top pick is a 42 mm steel Ballon Bleu 33701 replica built around a Swiss ETA 2824-2 or Sellita SW200, because that is the only tier where the movement's real 28,800 vph beat, its roughly 38 hour power reserve, and the 42 mm case proportions all line up with the watch being copied. We ranked candidates on four criteria: movement provenance backed by timegrapher data, case and dial fidelity, crown and blue cabochon execution, and bracelet finishing with clasp feel.

Option 1: Swiss ETA 2824-2 or Sellita SW200 build

This is the version worth owning if the watch will be worn often. Both movements are Swiss, both run at 28,800 vph, both hack and have a quickset date, and any competent watchmaker can regulate or service them.

  • Pros: genuine Swiss architecture with a smooth sweep, crisp date change, easy parts access, and a movement a local watchmaker will actually open.
  • Pros: holds regulation better over years than clone movements, so the daily rate stays predictable.
  • Cons: the most expensive tier, and supply moves in batches, so the exact build you want may be out of stock.
  • Cons: the \"Swiss\" label is claimed loosely by sellers, so without a movement photo you cannot confirm what is inside.

Use case: daily wear, office and weekend rotation, or anyone who plans to keep the watch for years and wants it serviceable.

Option 2: Asian clone 2824 build

Clone 2824 movements copy the Swiss layout, which keeps the case thickness and crown position correct. Execution varies from batch to batch.

  • Pros: noticeably less costly, correct automatic sweep, correct hand-winding and date functions, and dimensions that fit the 42 mm case without spacers.
  • Pros: many parts are interchangeable with the Swiss original, so a repair is not a dead end.
  • Cons: wider positional rate spread, rougher winding feel, and a rotor that can be audible in a quiet room.
  • Cons: finishing on bridges and rotor is basic, which matters if you ever open the caseback.

Use case: occasional wear, a second or third watch, or a first replica where budget matters more than long-term serviceability.

Option 3: Quartz build

Quartz versions exist and are cheap, but they fight the reference. The 42 mm Ballon Bleu is an automatic watch, and a quartz build usually shows it in the case thickness and the ticking seconds hand.

  • Pros: low cost, high accuracy, no servicing, and a thin case that sits well under a cuff.
  • Cons: ticking seconds hand, wrong weight and thickness, and a caseback that does not match the reference.
  • Cons: almost no resale value and nothing to regulate or service later.

Use case: a costume piece or a gift for someone who will not notice the movement. Skip it if you care about the reference at all.

Case, dial, and crown checks specific to the 33701

Sellers apply the 33701 reference loosely, so confirm the diameter in the QC photos before anything else. The 42 mm case should measure about 42 mm across the bezel, not across the crown. Then work through the details that separate a good build from a rushed one.

  • Crown: fluted crown nested inside the crown guard, with a domed blue synthetic spinel cabochon that sits flush and matches the dial tone in daylight.
  • Dial: concentric guilloché rings with clean, even spacing and no flat spots; Roman numerals with sharp edges and no ink bleed.
  • Hands: blued sword hands, correct length to the minute track, with a smooth sweep and no stutter.
  • Crystal: sapphire with a slight dome, and no heavy blue anti-reflective tint.
  • Caseback: engraving depth is even, screws sit flush, and the reference and serial markings are legible.

Bracelet and clasp

The bracelet carries a lot of the perceived quality. Look for consistent alternation of brushed and polished surfaces, links that flex without rattling, and end links that meet the case lugs with a tight, even gap on both sides. The deployant clasp should open with firm push buttons and close with a solid click, and the engraving should be cut, not printed. Ask whether the bracelet is held by screws or friction pins. Screws are easier to size at home and less likely to work loose.

Checklist before you pay

  1. Request a movement photo and a timegrapher printout: rate within about plus or minus 10 seconds per day, amplitude in the 270 to 310 degree range, beat error under 0.5 ms.
  2. Confirm the movement is marked ETA or Sellita in the photo, not just in the listing text.
  3. Get a daylight photo of the cabochon and the crown guard from two angles.
  4. Ask for a wrist shot on a 7 inch wrist to judge how the 42 mm case actually wears.
  5. Confirm the water resistance claim, then treat the watch as splash resistant only and do not swim in it.
  6. Check the return window for a dead-on-arrival movement before you commit.

Which one to buy

If you want one watch that behaves like the real thing, take the Swiss movement build and budget for a regulation visit in the first year. If you want the look at the lowest sensible cost, the clone 2824 is the practical middle. Skip quartz for this reference unless the watch is purely for a costume.