An extraordinary example of the Breguet Classique Perpetual Calendar reference 5327 in 18k rose gold, coming from its original owner and sold new in Geneva in 2005. This masterpiece of traditional watchmaking has just returned from a complete service by Breguet in 2025 (CHF 3’300), which included polishing, a new alligator strap, replacement of the crystals, and new correctors, leaving the watch in exceptional overall condition. The dial is a stunning demonstration of hand-guilloché artistry — a hallmark of Breguet. Its multiple engraved textures, rendered in perfect symmetry, play beautifully with the light and give the perpetual calendar indications exceptional clarity and depth. Few watches showcase traditional dial craftsmanship at such a high level. Inside beats the Breguet caliber 502.3, an ultra-thin automatic movement with a solid gold, off-center guilloché rotor. The movement is richly decorated with anglage, perlage, and Côtes de Genève, all executed to Breguet’s highest standards. Despite its slim architecture, this caliber drives a full perpetual calendar with moonphase — an impressive technical achievement. The workmanship visible through the sapphire caseback is nothing short of breathtaking. Complete with its full original set, including box, papers, and accessories, this 5327BR represents the very essence of the Breguet Classique collection: mechanical sophistication, timeless elegance, and hand-finished artistry. A true horological masterpiece — and one of the most beautifully executed perpetual calendars of the modern era.