Launched in 1985, the Patek Philippe reference 3940 was the house’s second automatic perpetual calendar, and its slim, stepped Calatrava-style case in 36 mm brought the complication into a dress-watch format. This second-series example in 18k white gold is powered by the automatic calibre 240 Q, the micro-rotor movement that tracks the day, date, month, moon phase, 24-hour indication and leap year. Supplied with box and papers.
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