Patek Philippe 3940J Grand Complication Perpetual Calendar 18K YG Silver Dial

The Patek Philippe 3940J Grand Complication stands as a benchmark in the history of the brand’s perpetual calendars, embodying both pedigree and elegance. Introduced in 1985 and produced for over two decades, the 3940J features an 18K yellow gold case paired with a solid case back, an attribute highly prized among early examples. Its 36mm diameter and slim 8.8mm profile ensure a refined wrist presence, emphasizing classic proportions in line with Patek’s design philosophy of the era. Powering this horological masterpiece is the ultra-thin automatic Caliber 240 Q, renowned for its efficiency and reliability, with a micro-rotor construction that enables the perpetual calendar complication to remain svelte and wearable. The silver dial is adorned with subdials indicating day, date, month, leap year and moonphase, arranged in the brand’s quintessentially balanced layout. As part of the Grand Complication line, the 3940J is lauded among collectors for ushering Patek Philippe into the modern era of complex calendar watches following the quartz crisis. The piece's understated aesthetics, technical refinement, and landmark status within the Patek catalog make it a touchstone for connoisseurs seeking both mechanical gravitas and timeless sophistication. Its relevance endures, with solid case back versions considered increasingly collectible, narrating a pivotal chapter in haute horlogerie. Like New with Patek Philippe box, service receipt from 2024 and the extract from the Patek Philippe Archives dated 1987.