Answer first
No Cartier watch carries the reference IW938907. Cartier case numbers use four letters and four digits, with an optional CR prefix: WSSA0018, CRWSSA0018, WSBB0044. The IW prefix belongs to IWC Schaffhausen, which formats references as IW plus six digits, such as IW388106. A listing that reads "Cartier replica iw938907" joins two brands. The code is a listing error or a seller SKU, not a Cartier model.
What "1:1 replica" means in listings
The phrase has no standard. Sellers use it for watches from $80 to $800. Two watches with the same label can differ in case finish, movement, and dial print. Ask for photos of the caseback, the clasp, and the movement. Compare them with the current model on Cartier's site.
Checklist before paying
- Reference: ask for the four-letter, four-digit code and the case size in mm.
- Movement: quartz or automatic. Cartier fits automatic calibers to most Santos and Ballon Bleu models and quartz to several Tank and Panthère sizes.
- Case size: check the figure against Cartier's published number, not the seller's wording.
- Water resistance: Cartier rates most Santos and Ballon Bleu cases at 100 m (10 bar).
- Engraving: the reference sits between the lugs on the caseback side. A photo of that spot is the test.
- Set: box, booklet, and card with a serial that matches the case engraving.
Sizes Cartier publishes
Cartier lists Santos de Cartier at 35.1 mm (medium) and 39.8 mm (large). Ballon Bleu de Cartier comes at 33 mm, 36 mm, 40 mm, and 42 mm. Tank Must large measures 33.7 mm by 25.5 mm. Use these figures to check a listing. A "large" listed at 41 mm is a different model or a wrong spec.
Legal position in the US
18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime. CBP can seize and destroy parcels that carry a counterfeit mark. A buyer faces a lower risk than a seller, but the parcel can still be seized and the payment lost. Wire and crypto payments leave no chargeback path.
iw938907 Cartier Replica Buying Guide: Specs to Demand Before You Pay
What is unknown
No Cartier catalog entry exists for IW938907. No public IWC database lists that code under a Cartier name. Ask the seller for a photo of the engraving between the lugs. A stock image in reply ends the check.