Patek Philippe Annual Calendar Chronograph 5905/1A-001.

Summary:
The Patek Philippe Annual Calendar Chronograph 5905/1A-001 represents the perfect balance between mechanical ingenuity and modern elegance. Crafted in stainless steel—a rarity for Patek Philippe’s complicated watches—this striking model features a sunburst green dial and integrated bracelet, offering a contemporary take on haute horlogerie. Combining an annual calendar with a flyback chronograph, it’s a sophisticated and highly functional timepiece for discerning collectors.

Key Features
1. Stainless Steel Construction

Sporty Sophistication: The 5905/1A-001 marks a bold departure from tradition with its full stainless steel case and bracelet—offering a modern, dynamic aesthetic rarely seen in Patek Philippe’s grand complications.

Robust and Elegant: With a 42mm case diameter and polished finish, this watch bridges sporty presence with refined elegance, perfect for both formal and casual settings.

2. Self-Winding Movement – Caliber CH 28‑520 QA 24H

Mechanical Excellence: At its core lies the self-winding Caliber CH 28‑520 QA 24H—an automatic movement that combines a column-wheel flyback chronograph with an annual calendar complication.

Functional Innovation: The annual calendar automatically adjusts for months with 30 or 31 days, requiring correction only once a year (at the end of February). A 60-minute chronograph counter is cleanly displayed at 6 o’clock, enhancing usability without cluttering the dial.

3. Sunburst Green Dial with Luminous Accents

Vibrant and Modern: The deep green sunburst dial delivers captivating depth, catching and reflecting light in varying shades.