The best fake Cartier Santos Large for most buyers is the 39.8 mm stainless steel model built on a Miyota 9015 automatic, because it holds the genuine case proportions, wears close to the real 9.38 mm profile, and can be regulated or serviced by a local watchmaker. The criteria that decide everything else are case diameter and thickness, bezel screw execution, dial printing and date position, bracelet tolerances, and the movement inside. Use the sections below to grade any listing before you pay.

What "Santos Large" actually means

Cartier builds the Santos de Cartier in several sizes, and sellers mix them up on purpose. The Large is 39.8 mm across and about 47.5 mm lug to lug, which is a big square case on paper and a medium watch on the wrist because of the curved lugs. The Medium is roughly 35 mm. A listing labeled Large that shows a 35 mm case is mislabeled, and you should treat every other claim in that listing with suspicion. Genuine steel Large references sit in the WSSA block, so ask the seller for a photo of the caseback engraving with the reference and serial visible.

Case and bezel: where cheap fakes show themselves

  • Thickness: the genuine case is 9.38 mm. Thin cases cost money to build. Many budget fakes run 10.5 mm to 12 mm and sit tall on the wrist.
  • Bezel screws: eight visible screws with flat slots, set at even spacing. Weak versions use rounded heads, glued inserts, or screws that do not line up with the bezel.
  • Crown cabochon: genuine uses a blue synthetic spinel. Cheap fakes use glass or dyed plastic that reads flat or purple in daylight.
  • Polishing: the Santos mixes brushed flats with polished bevels. If the transition looks like a soft blur instead of a line, the case was finished by hand with a buffing wheel.

Movement: the single biggest price driver

  • Quartz: cheapest, thinnest, and the second hand ticks. Fine for a desk watch, wrong for anyone who cares about the sweep.
  • Low-beat automatic (21,600 vph): smooth sweep in real time, but often noisy rotors and loose timekeeping.
  • Miyota 9015 or Seagull ST2130: 28,800 vph, hacking, hand winding, and parts that any watchmaker can source. This is the tier to buy if you plan to keep the watch for years.
  • Decorated clone of the 1847 MC: the closest look through a display back, the hardest to service, and the easiest to misrepresent in photos.

Dial, crystal, and hands

  • Roman numerals on the Santos are printed, not applied. Look for crisp edges without ink spread.
  • Sapphire with a clear anti-reflective coating beats mineral glass, which scratches and shows a milky reflection under store lights.
  • The date aperture should sit tight to the printed track at 3 o'clock. A window that cuts into the minute track is a tell.
  • Blued steel hands should shift color as you tilt the watch. Painted blue hands stay one shade.

Bracelet and SmartLink

Cartier uses SmartLink, a push-button system that releases links without tools, plus QuickSwitch for swapping straps. Most fakes copy the look and drop the function. Ask the seller to show a link being removed. If the answer is a screwdriver, you are buying a look, not a system. Also check that end links sit flush against the case with no gaps and that the clasp closes with a firm click instead of a rattle.

Water resistance and daily wear

Treat any replica as splash resistant at best unless a seller shows a pressure test. Gaskets on budget builds are thin, casebacks are often hand tightened, and crown tubes leak. Do not swim or shower in one, and dry the case after washing your hands.

Which version fits which buyer

  • Daily wear, one watch: steel Large on a Miyota 9015 with a functional SmartLink style bracelet.
  • Caseback visible to others: pay for the decorated movement and the thin case, since the rotor is the part people see.
  • Tight budget, occasional wear: quartz Large, accepting the ticking hand and lighter weight.
  • Planned service or resale: stick to Miyota or Seagull movements with documented parts support.

Pre-purchase checklist

  1. Confirm 39.8 mm case and a measured thickness close to 9.4 mm.
  2. Ask for macro photos of the bezel screws, crown cabochon, and dial printing.
  3. Request a caseback photo with reference and serial legible.
  4. Confirm the movement name in writing, not just "Swiss style."
  5. Ask about the bracelet system and whether links release with a button.
  6. Check the return window before payment.