Ronde Must 40mm Steel Automatic WSRN0035

Description of the Cartier watch

The Cartier Ronde Must de Cartier 40 mm (WSRN0035) is a classic men’s/unisex timepiece, crafted in polished stainless steel. Its round 40 mm case houses a sand‑blasted silver dial, traditional Roman numerals, and blued‑steel sword‑shaped hands signature elements that reflect the heritage of Cartier watchmaking. The overall design is timeless and versatile, ideal for both formal and everyday wear.

What makes this Cartier watch exceptional?

The Ronde Must de Cartier blends vintage-inspired elegance with modern reliability. Measuring a comfortable 40 mm diameter and just 9.62 mm thick, it offers perfect wrist presence without bulk. Its polished steel case, beaded crown crowned with a synthetic cabochon‑shaped spinel, and the refined silvered dial combine to create a dress watch that’s both understated and distinctive.

Design & Craftsmanship

• Case & Bezel: The case is stainless steel, finely polished, with inward-curving lugs that taper into the bracelet a hallmark of classical Cartier proportions. The crown is beaded and topped with a synthetic blue cabochon, offering a subtle luxury detail.

• Dial: Finished in sand-blasted silver, the dial features Roman numerals, a railway‑style minute track, and blued‑steel sword‑shaped hands that deliver clear legibility while maintaining elegant aesthetics. 

• Bracelet / Strap: Fitted with a stainless‑steel bracelet that flows seamlessly from the case, the watch maintains a unified, refined look. The bracelet uses Cartier’s interchangeability system, allowing for strap customization when desired.

Features & Complications

• Hours, minutes, seconds display with central sweep straightforward elegance with no clutter. 

• Date window at 3 o’clock (depending on variant) adds practicality for daily wear. 

• Sapphire crystal for scratch resistance and clarity.

• Water resistance up to 3 bar (~30 m), sufficient for everyday situations (splashes, rain)  though not for swimming or diving. 

Specifications

Case

• Material: Stainless steel

• Diameter: 40.0 mm 

• Thickness: 9.62 mm 

• Crown: Beaded with synthetic cabochon‑shaped spinel 

• Water Resistance: 3 bar (~30 m) 

Dial

• Finish: Sand‑blasted silver 

• Markers: Roman numerals

• Hands: Blued‑steel sword‑shaped

Bracelet / Strap

• Material: Stainless steel

• Clasp: Folding / deployant clasp, integrated design with case

Movement

• Caliber: Cartier 1847 MC (automatic)

• Type: Self‑winding mechanical 

• Functions: Hours, minutes, seconds, date

• Power Reserve: ~42 hours 

• Origin: Switzerland (Cartier manufacture)