The Patek Philippe reference 5100, known as the 10 Day, is one of the manufacture's most distinctive shaped watches, combining innovative engineering with the timeless elegance of the Gondolo collection. Introduced in 2000 to mark the arrival of the new millennium, the 5100 was produced as a limited edition of just 3,000 pieces across four precious metals. Powered by the manually wound Calibre 28-20 REC 10J PS IRM C J, it was developed specifically to deliver an exceptional ten-day power reserve while maintaining outstanding chronometric performance. A linear power reserve indicator, subsidiary seconds and date display complement the movement, making the watch as practical as it is technically impressive.

The reference 5100's elongated rectangular case reflects the Art Deco-inspired design language that defines the Gondolo family, while its beautifully finished movement showcases Patek Philippe's commitment to traditional hand craftsmanship. Produced in yellow gold, white gold, rose gold and platinum, the 5100 occupies an important place in the manufacture's modern history, serving as the precursor to later shaped masterpieces such as the reference 5101 Tourbillon and the 5200 Eight Days. Today, it is admired by collectors for its limited production, architectural design and pioneering movement, making it one of Patek Philippe's most significant commemorative timepieces of the modern era.