To celebrate the 150th anniversary of the remarkable partnership between Patek Philippe and Tiffany & Co., the brand released the exemplary annual calendar reference 5150 in 2001.The ref. 5150 features an officer-style case with a hinged caseback and is fitted with an unusual Louis XV-style crown, characterized by elegant curves that evoke a subtle air of nostalgia.

Unique to this reference, the watch presents an aesthetic departure from the firm’s traditional annual calendar design. Under the creative influence of Philippe and Thierry Stern, the month is indicated as a numeral for the first time, rather than in the usual text format. The dial is adorned with an oversized "T" at 12 o’clock, representing the retailer, with the Tiffany & Co. signature elegantly positioned beneath the moon phases. Additionally, the caseback is immaculately engraved with the façade of the original workshop in Geneva that the two brands shared during the 1860s.

The ref. 5150 was produced in a limited edition of 150 examples each in yellow, white, and pink gold. Offered in well-preserved condition, the present ref. 5150 in white gold comes complete with its full set of accessories from the retailer, representing the legendary partnership between these two powerhouses in the luxury world.