Patek Philippe Calatrava 3445

The Patek Philippe reference 3445, introduced in 1961, marked a significant development as the brand's first serially produced self-winding, waterproof wristwatch featuring a date complication. This reference was a cornerstone in Patek Philippe's offerings, providing a robust and practical timepiece for daily wear while maintaining the brand's commitment to horological excellence. Its introduction represented an important step in integrating automatic movements and water resistance into their standard production models. This reference typically features a 35mm case, often crafted from 18k yellow gold, though other precious metals were also used. It is powered by the Patek Philippe caliber 27-460 M, an automatic movement known for its reliability and precision. The watch is fitted with a sapphire crystal, contributing to its durability and legibility. The water resistance rating for this model is 30 meters, suitable for protection against splashes. The reference 3445 appeals to collectors seeking a historically important Patek Philippe timepiece that combines technical innovation with classic design. Its role as the first serially produced automatic date watch with water resistance makes it a notable piece in the brand's heritage. Variants of this reference exist, primarily differing in dial finishes and case materials, offering collectors a range of options within this foundational model.