Cartier, Santos, model: W20073X8, automatic mechanical, stainless steel, dial diameter: The 51.1 x 41.3mm Santos was the world's first modern wristwatch, born in 1904, specially designed for Brazilian aviator Albert Santos Dumont, allowing him to conveniently check the time while piloting airships and ushering in the era of wristwatches. The signature square case and exposed screws design are its soul elements. The lines are bold and sharp, combining a sense of sportiness with an elegant demeanor. This watch has been modified with post-set diamonds (aftermarket diamonds) on the bezel and case of the basic model, significantly enhancing its sense of luxury. The white dial is paired with Roman numeral hour markers and black sword-shaped hands. There is no date window at 3 o 'clock. The overall design is simple and elegant, and it is made of black alligator leather. (Aftermarket diamonds