Patek Philippe 5905/1A-001 – Annual Calendar Chronograph | Stainless Steel | Green Dial | 2021 | Excellent Condition | Full Set
🧾 Product Description
The Patek Philippe 5905/1A-001 marks a bold evolution of one of the brand’s most admired modern complications — combining the sophistication of an annual calendar chronograph with the sleek modernity of stainless steel.
Introduced in 2021, this reference captivated collectors worldwide for its vibrant olive-green sunburst dial — a striking departure from Patek’s traditional hues. The dial’s elegant balance showcases day, date, and month apertures gracefully positioned along the top arc, complemented by a 60-minute chronograph counter at 6 o’clock and a discreet 24-hour indicator.
At its heart lies the self-winding Caliber CH 28-520 QA 24H, a masterpiece of mechanical engineering. This movement merges column-wheel chronograph architecture with an annual calendar mechanism requiring only one correction per year (at the end of February). Viewed through the sapphire exhibition caseback, the rotor engraved with the Calatrava Cross glows with artisanal perfection.
The stainless-steel integrated bracelet and polished-brushed 42 mm case lend a sporty yet refined presence, making this reference one of the few truly versatile high complications from Patek Philippe — equally suited to formal attire or casual elegance.
This 2021 example is offered in excellent pre-owned condition, meticulously preserved and unpolished, with sharp edges and original finishing intact. Accompanied by its complete full set — original Patek Philippe presentation box, certificate of origin, manuals, and leather folder.
Specifications
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Brand: Patek Philippe
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Model: Annual Calendar Chronograph
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Reference: 5905/1A-001
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Year: 2021
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Condition: Excellent (Pre-Owned)
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Case Material: Stainless Steel
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Case Diameter: 42 mm
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Thickness: 14.1 mm
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Dial: Olive-Green Sunburst with White Gold Indexes
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Movement: Automatic Caliber CH 28-520 QA 24H
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Functions: Annual Calendar ( Day, Date, Month ), Chronograph, 24-Hour Indicator
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Crystal: Sapphire (front and back)
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Bracelet: Integrated Stainless Steel Bracelet with Polished Center Links
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Clasp: Fold-Over Patek Philippe Deployant
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Water Resistance: 30 m
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Includes: Box, Papers, Manuals, Certificate of Origin (2021)
Why Collectors Want It
The 5905/1A-001 represents a rare moment in Patek Philippe’s lineage: a steel complication with a vivid, modern dial that instantly became one of the brand’s most talked-about releases. Its production in limited quantities and meteoric demand have made it a modern-era grail, blending investment appeal with daily wear versatility.
