Cartier Calibre de Cartier Automatic 42mm（ W7100041）/WHP035922

"42mm black dial, stainless steel
Automatic mechanical" 

In-house movement and precise performance: Equipped with Cartier's first 100% in-house automatic mechanical movement 1904 MC, featuring dual winding cases, with a power reserve of 48 hours; the movement is adorned with Geneva stripes, with an oscillation frequency of 28,800 vibrations per hour, and the timekeeping is stable and precise.
Iconic design language: A 42mm stainless steel case paired with a black crocodile leather strap, with a blue synthetic corundum on the crown and a protective cap; the black dial integrates Roman numeral hour markers, a sub-dial for the small seconds hand (at 6 o'clock position) and a calendar window at 3 o'clock, with a sword-shaped pointer coated with night light, combining a sporty feel with luxurious recognition.
Material and craftsmanship details: Sapphire glass on the case back and a transparent case bottom (allowing the movement decoration to be seen), 30 meters of water resistance for daily protection; the stainless steel folding clasp ensures comfortable wearing, with an overall design that balances "powerful" and "elegant" elements.
Style adaptability: The combination of a black dial and black leather strap is understated and versatile, with a 42mm case size suitable for most wrist sizes, capable of handling both business formal wear and casual outfits, making it a representative of Cartier's "masculine sport luxury" style.