Q: What is the Cartier 21 Must de Cartier 31mm Watch?
A: This is a vintage Swiss-made Cartier Ref. 1330 with a 31mm case, combining stainless steel with gold-plated details. Signature features include the engraved Roman numeral bezel, white dial, blue sword-shaped hands, sapphire cabochon crown, and link bracelet.

Q: Is 31mm a good everyday size?
A: Yes. A 31mm Cartier 21 is considered a refined mid-size watch that wears elegantly and comfortably for daily use. This specific bracelet fits a 17.5 cm wrist or smaller, so it is best suited to slimmer to average wrist sizes.

Q: Is this watch quartz or automatic?
A: It is a quartz watch, meaning it is battery-powered rather than automatic. Quartz movements are valued for reliable, precise timekeeping and low day-to-day maintenance.

Q: How often does the battery need replacing?
A: Cartier advises that quartz watch batteries typically last at least around three years, with battery service commonly carried out every two to three years. For a vintage watch, professional replacement is recommended so the seals can be checked and the case can be properly resealed.

Q: Is this watch water-resistant?
A: As with most vintage watches, current water resistance cannot be guaranteed unless it has been recently pressure-tested. We recommend treating it as suitable only for light splashes and avoiding swimming, showering, saunas, and full submersion.

Q: What condition is this watch in?
A: This piece is listed in very good overall condition, with good external and internal condition. The hardware remains shiny but shows scratches, which is consistent with careful vintage wear and should be reviewed in the product information photos.

Q: Will the bracelet fit my wrist?
A: The bracelet currently fits a wrist measuring up to 17.5 cm. If your wrist is larger, or if you prefer a looser fit, we recommend checking with us before purchase as no extra links are listed in the product information.

Q: Does it come with box, papers, or spare links?
A: No additional items are listed with this watch. If a box, papers, spare links, or other extras are not mentioned in the product information, they are not included.

Q: How should I care for a vintage two-tone Cartier watch?
A: Wipe it gently with a soft dry cloth, keep it away from perfumes, lotions, and harsh cleaning products, and remove it before sport or water exposure. For long-term care, store it in a dry place and have it serviced professionally when needed.

Q: How do I know this watch is authentic?
A: Every item sold by A Retro Tale is carefully authenticated before listing. With vintage Cartier watches, buyers often look for correct case finishing, dial details, serial and reference markings, cabochon crown, and overall construction quality.