Answer first: what to check before you buy

Ask for three measurements in writing: case width, case length from lug tip to lug tip, and total thickness. Then ask which movement is inside and whether the caseback is screwed or pressed. A seller who answers those four questions with real numbers and photos of the actual unit is worth continuing with. A seller who replies with adjectives instead of figures is not. The Panthère Large is a case-driven watch, so proportion and finish across a few square centimeters decide whether the piece reads as convincing on the wrist.

Why this model is hard to fake well

The Panthère is a thin, flat, rounded square design with a screw-set bracelet. Small errors in corner radius, polish direction, or link gap show up under ordinary light because there is nowhere to hide. That makes the Large a useful test of a maker. If their version holds together, their other square and cushion models usually do too.

What to look for

Case

  • Rounded square outline with the crown nestled into the case flank, not standing proud of it.
  • A bezel that runs flat across the top and rolls softly into polished corners.
  • Thickness consistent with a dress watch. A slab-like case is the most common tell.
  • Screw bars or quick-release spring bars, plus a caseback with crisp, deep engraving.

Crown and crystal

  • A cabochon seated flush in the crown, deep blue and free of bubbles.
  • Sapphire with no visible ring of glue at the edge. Mineral glass scratches within weeks.

Bracelet

  • Links taper and articulate without rattle or grit in the joints.
  • Screws are a sign of a higher tier than push pins, and they matter when the watch is resized.
  • Check the clasp fold and deployant tension. A loose clasp looks cheap from across a table.

Dial

  • Numerals and markers should sit on one consistent circle.
  • Print quality under a loupe. Jagged serifs and heavy ink are red flags.
  • Hands at the correct length with clean tips and no bending.

Parameter bands to verify

Cartier has revised this line more than once, so treat any figure you read online, including the ones here, as a starting point and confirm against the current official listing for the exact model being copied. The large Panthère sits in the small square case band, roughly in the low 30 mm range across the case and around 40 mm lug to lug, with a thickness that keeps it firmly in dress watch territory. A replica listing a case size well outside that zone is likely a generic square case with a Panthère label attached. Weight matters as well: a steel bracelet version should feel dense and cool at first, not hollow.

Where buyers get taken

  1. Shopping from photos alone. Insist on a wrist shot, a macro of the crown, and a clear caseback shot.
  2. Trusting labels like 1:1 or AAA. They are marketing terms with no shared standard behind them.
  3. Buying packaging first. A convincing box says nothing about the watch inside it.
  4. Ignoring the bracelet screw type, which affects service and resizing later.
  5. Paying in a way you cannot dispute. Use a method with a chargeback path.
  6. Assuming water resistance. Have any non-original watch pressure tested before it sees water.

Legal reality in the United States

Counterfeit watches are illegal to import and to sell in the United States. US Customs and Border Protection can seize shipments and assess penalties, and trafficking in counterfeit goods carries civil and criminal exposure under federal trademark law. Buying one for personal use is a different question from selling one, but a seized parcel is a total loss with no recourse. Know this before you spend.

FAQ

Which movement should I expect?

Most references of the original large Panthère use quartz. A quartz replica can be thin and accurate, which suits this case shape. If a seller offers an automatic version, ask for the movement name and expect a thicker case as a result.

Will it pass as genuine?

Not to a jeweler or appraiser holding the watch, and not to a brand service center. A realistic goal is a piece that looks right at arm's length and feels solid on the wrist.

How do I size it?

Measure your wrist in millimeters and ask for the bracelet length before ordering. Removing links is simple with screws and awkward with pins, so ask which one you are getting.

What about the box and papers?

They are props. Value them at close to nothing when deciding what to pay.

Can a replica be serviced?

Independent watchmakers will usually replace a quartz movement or reseat a crystal. Brand service centers will not touch it.