Patek Philippe · Complications
Patek Philippe Annual Calendar Chronograph 5905A (reference 5905/1A-001) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.
A 42 mm complication / chronograph watch with automatic movement (Patek CH 28-520 QA 24H) and 30 m water resistance.
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Strengths and considerations
Strengths
- Complication / Chronograph design; Automatic movement; 30 m stated water resistance.
Considerations
- Swimming or demanding water use.
See sources
Manufacturer and technical references used to verify this watch specification.
Specifications last verified: 2026-08-14.
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