
IWC
Portugieser 40
Ref. IW358303
$7k–$8k
Pre-owned: $6k–$7k
Complete head-to-head comparison
Comparing the IWC Portugieser 40 ($7k–$8k, 30m WR, 40mm) against the Cartier Ronde Solo de Cartier ($3k–$4k, 30m WR, 36mm). The Cartier Ronde Solo de Cartier is the more affordable option by $4k.

IWC
Ref. IW358303
$7k–$8k
Pre-owned: $6k–$7k

Cartier
Ref. W6700255
$3k–$4k
Pre-owned: $3k–$4k
Price
Water Resistance
Score
Repurchase
Pros
Cons
Pros
Cons
Community Verdict
Too Close to Call
Cartier Ronde Solo de Cartier is the value winner at $3k–$4k — over 50% cheaper than the IWC Portugieser 40 ($7k–$8k). IWC Portugieser 40 offers automatic craftsmanship; Cartier Ronde Solo de Cartier runs quartz for higher accuracy and lower maintenance. Case size: IWC Portugieser 40 at 40mm suits larger wrists; Cartier Ronde Solo de Cartier at 36mm is the more compact option.
Both are excellent watches with different strengths. The IWC Portugieser 40 offers a larger case and costs more new. The Cartier Ronde Solo de Cartier excels in overall construction. The best choice depends on your wrist size, budget, and preferred aesthetic.
The IWC Portugieser 40 retails for $7k–$8k, while the Cartier Ronde Solo de Cartier is priced at $3k–$4k. Pre-owned, expect $6k–$7k and $3k–$4k respectively. Actual secondary market prices vary based on condition and demand.
The IWC Portugieser 40 has a 40mm case diameter with 10.8mm thickness, while the Cartier Ronde Solo de Cartier measures 36mm × 7.3mm. Both have lug-to-lug measurements of 47mm and 41mm respectively. Consider your wrist size and wear style when deciding.
The IWC Portugieser 40 is water-resistant to 30m, while the Cartier Ronde Solo de Cartier offers 30m. Both are suitable for swimming and snorkeling at their respective depths. For professional diving, verify the rating exceeds 300m and includes a screw-down crown.
The IWC Portugieser 40 uses a automatic Cal. 82100 with 60 hours power reserve. The Cartier Ronde Solo de Cartier features a quartz Cal. 157 power reserve. Check movement specifications for specific features like chronograph or GMT functionality.
IWC and Cartier both command strong secondary markets. Pre-owned pricing shows an estimated resale value of $6k–$7k for the Portugieser 40 and $3k–$4k for the Ronde Solo de Cartier. Condition, service history, and box/papers significantly impact resale value for both models.
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