Technical Details & Model History

• Case: 18kt yellow gold, approx. 35 mm diameter
• Movement: automatic caliber 315 S QR with retrograde date indication
• Complications: full perpetual calendar – day, month, leap year, moon phases, and retrograde date
• Dial: opaline with applied gold hour markers
• Casebacks: double – one sapphire crystal to view the movement, one solid yellow gold
• Strap: dark brown alligator leather with original Patek Philippe gold buckle
• Documentation: includes original box, papers, and two Patek Philippe archive extracts!

Key Features

• First serially produced reference featuring a perpetual calendar with retrograde date, introduced in 1993
• Elegant and balanced layout: windows for day and month, retrograde date hand, moon phases at 6 o’clock
• Double caseback combining aesthetics and mechanical visibility—a highly appreciated feature among collectors
• Ref. 5050 was produced until 2002 in yellow, rose, white gold, and platinum versions

Historical Context

The Patek Philippe ref. 5050 marks a milestone in the evolution of perpetual calendar complications. Its combination of retrograde date, moon phases, and high-end automatic movement makes it a distinctive and highly sought-after model among serious collectors.