Two Known. One for Sale.

A rare Patek Philippe is about to make waves at auction, and it’s not your average vintage piece.

This is the Ref. 2523 with a polychrome cloisonné enamel dial featuring South America. Made in 1953, it's one of only two known in yellow gold and the only one ever offered at public auction. Estimated to exceed 5,000,000 Swiss Francs, it will be Lot 27 at the Phillips Geneva Watch Auction: XXIII this May.

The Ref. 2523 is a second-generation world-time watch from Patek Philippe, following the Ref. 1415. It features a larger 36mm case and a second crown at nine o'clock for rotating the city ring—a system developed from Louis Cottier's pioneering mechanism. This allows for quick time reading across major world cities.

The dial is where things get interesting. It showcases a map of South America in vivid polychrome enamel using the cloisonné technique—delicate gold wires outline the design, filled with colored enamel and kiln-fired to create a glass-like surface. It's not just decorative; it tells a story with a ship sailing across the Pacific and marine life in the Atlantic.

With only 29 to 36 examples of the Ref. 2523 produced across all variations, cloisonné dials are particularly sought after. The South America version is considered the rarest, making this watch especially significant.

This piece was last seen publicly in 1988 and remains in remarkable condition with its crisp case and vibrant dial intact. If you’re interested—and have deep pockets—you’ll find it at Phillips this May.