Patek Philippe 3940G & 5712A Acquisition

The Patek Philippe Reference 3940 is a perpetual calendar wristwatch that was introduced in 1985, succeeding the Reference 3450. It is notable for its relatively slim profile and the integration of a perpetual calendar complication in a refined case. This reference became a cornerstone of Patek Philippe's complicated watch offerings for nearly two decades, establishing a design language for subsequent perpetual calendar models. It represents a significant period in the brand's modern history of complicated timepieces.

The watch features a 36mm case, typically crafted from yellow gold, rose gold, white gold, or platinum. It houses the self-winding Caliber 240 Q movement, which is known for its micro-rotor construction, contributing to the movement's thinness and allowing for a slimmer case profile. The movement provides a power reserve of approximately 48 hours. The dial is protected by a sapphire crystal, often accompanied by an interchangeable solid case back and a sapphire display back.

Reference 3940 is highly regarded by collectors for its classic proportions and the enduring appeal of its perpetual calendar display, which includes day, date, month, leap year cycle, and moon phases. It was produced in several series, with subtle variations in dial layout and typography, making early series examples particularly sought after. The reference is considered a benchmark for perpetual calendar watches and remains a significant piece for those appreciating traditional horological complications.

The Audemars Piguet Royal Oak reference 5712 represents a 36mm iteration within the Royal Oak series, produced during the 1980-1990 period. This reference features a blue dial configuration paired with stainless steel construction throughout both case and bracelet.

The 36mm stainless steel case houses the automatic caliber 2121 movement, delivering a 40-hour power reserve. The watch incorporates a fixed octagonal bezel and sapphire crystal, with 50-meter water resistance. The integrated steel bracelet completes the stainless steel construction.

This reference appeals to collectors seeking a vintage-production Royal Oak in the smaller 36mm case size. The blue dial variant offers an alternative to more common dial colors within the reference range. The decade-long production window from 1980-1990 places this reference within the early Royal Oak manufacturing period.

The Patek Philippe Reference 3940G is a perpetual calendar wristwatch, notable for its self-winding movement and the integration of multiple calendar indications within a relatively understated case design. It was introduced as a successor to earlier perpetual calendar models, offering a more contemporary aesthetic while maintaining traditional horological craftsmanship. The reference is recognized for its balanced dial layout and its role in Patek Philippe's perpetual calendar lineage.

The watch features an 18k white gold case measuring 36 mm in diameter, housing the ultra-thin automatic caliber 240 Q. This movement provides a power reserve of approximately 48 hours and is protected by a sapphire crystal. The dial is typically white or silver, displaying the day, date, month, leap year cycle, and moon phases, along with a 24-hour indicator. Its construction emphasizes a blend of technical complexity and wearability.

For collectors, the 3940G represents a significant perpetual calendar reference from a period of evolving design at Patek Philippe. It appeals to those who value classic proportions and comprehensive calendar functionality without excessive embellishment. The reference was produced in various precious metals, with the white gold variant offering a distinct aesthetic within the series.