Quick answer
A Cartier Rotonde 38mm replica should match a 38mm steel case, a silvered dial with Roman numerals, a fluted crown with a blue synthetic spinel, and the layout of Cartier caliber 049. Check the case thickness, dial printing, crown height, lug width, and caseback marks. The genuine Rotonde 38mm uses a 38mm case, a 42-hour power reserve, and 30m water resistance. A replica is not a Cartier watch and has no Cartier warranty.
Genuine baseline specs
Use these numbers as a checklist.
- Case diameter: 38mm
- Case thickness: about 9.5mm, confirm per reference
- Movement: Cartier caliber 049, automatic
- Power reserve: 42 hours
- Frequency: 28,800 vph
- Water resistance: 30m, 3 bar
- Crystal: sapphire
- Crown: fluted steel with blue synthetic spinel
- Dial: silvered opaline, Roman numerals, blued-steel sword hands
- Strap: alligator leather with steel pin buckle
Reference numbers vary by dial and strap. Confirm the exact reference before comparing details. If the seller cannot name the reference, treat the listing as unknown.
Dial details to inspect
The dial is the first mismatch on a replica. On the Rotonde 38mm, the Roman numerals sit on a silvered ground. The printing is black and sharp at 38mm. The hands are blued steel, sword shape, and reach the minute track. The secret signature sits in the VII numeral. On a low-grade replica, the Cartier text in the VII is too wide, too dark, or missing. The minute track dots and lines should be even. The date window, when present, sits at 3 o'clock and shows a white disc with black numerals. Check that the date font matches Cartier, not a generic font.
Case and crown checks
Measure the case with calipers. A 38mm Rotonde should read 38.0mm across the bezel, not 39mm or 40mm. The caseback should sit flat. The crown is fluted and set with a blue cabochon. On many replicas the cabochon is glass or plastic, not synthetic spinel, and the crown is too tall. The lugs should curve down. Confirm the lug width with a ruler. A strap that is too wide or too narrow is a mismatch.
Movement and caseback
The genuine caliber 049 is a Cartier-labeled automatic with 42 hours of power reserve. If the replica has a display back, look at the rotor engraving and the balance frequency. A 21,600 vph movement is a mismatch. A 28,800 vph movement is correct for the caliber 049. Many replicas use a Miyota or Seiko automatic. That is not a defect by itself, but the seller should state the movement. Ask for the movement name and the power reserve. A 38-hour reserve is not a 42-hour reserve.
Weight, finish, and strap
Ask for a scale photo. Weight varies with strap and case finish. A 38mm steel case on leather sits near 60g to 70g on many listings. A replica that weighs 45g uses less steel or a thin case. The bezel should have a polished finish and the case sides a brushed finish. The alligator strap should have square scales and a steel pin buckle with a clean engraving. A stamped buckle with soft edges is a low-tier part.
Questions for the seller
- What is the exact case diameter and thickness?
- What movement is inside, and what is the power reserve?
- Is the crown cabochon synthetic spinel or glass?
- What is the lug width?
- Can you send a photo of the caseback and the VII numeral?
If the answers are vague, the replica is not a 1:1 match. A replica is not a genuine Cartier watch. It has no Cartier service history and no Cartier warranty. In the US, selling a counterfeit as genuine is illegal.