Royal Oak Perpetual Calendar 26579CE Luxury
Technical Product Profile
Royal Oak Perpetual Calendar 26579CE Luxury
A 41 mm black ceramic perpetual calendar with moon phase and week indication.
Overview
The Royal Oak Perpetual Calendar 26579CE Luxury combines an all-black ceramic case and bracelet with one of the most complete traditional calendar displays. The 41 mm dial presents the day, date, month, astronomical moon phase, leap-year cycle and week indication. Its complex information is arranged across multiple subdials while the octagonal case retains a strong integrated sports-watch identity.
Best suited for: Designed for experienced collectors who appreciate advanced traditional complications and a modern monochrome ceramic presentation.
Technical Specifications
| Case diameter | 41 mm |
| Case construction | Black ceramic |
| Bezel | Octagonal black ceramic bezel with exposed screws |
| Dial | Open and multi-register perpetual-calendar display |
| Movement | Ultra-thin automatic perpetual-calendar movement |
| Power reserve | Approximately 40 hours |
| Functions | Hours, minutes, day, date, month, moon phase, leap year and week number |
| Crystal | Sapphire crystal and transparent-style case back |
| Water resistance | Approximately 20 metres / 2 ATM |
| Bracelet / strap | Integrated black ceramic bracelet |
| Clasp | Folding clasp |
Movement & Engineering
A perpetual calendar mechanically accounts for the different lengths of months and the leap-year cycle when continuously running and correctly set. The moon-phase indication tracks the lunar cycle, while the peripheral week scale provides an additional annual reference. The ultra-thin movement allows this complexity to remain within a wearable case profile.
Design & Wearing Experience
Black ceramic gives the watch a monochrome technical appearance and offers excellent resistance to surface scratching. The multi-level dial uses contrasting hands, tracks and subdials to separate each calendar function. Brushed ceramic surfaces are combined with polished bevels for depth.
Key Details
- Mechanical perpetual-calendar complication
- Day, date, month, leap-year and week indications
- Astronomical moon-phase display
- Full black ceramic case and integrated bracelet
- Ultra-thin automatic movement architecture
Care & Maintenance
Perpetual calendars must be adjusted only according to the correct sequence and outside the restricted date-change period. Avoid pressing calendar correctors without proper instructions. The low water-resistance rating means the watch should be protected from immersion and heavy moisture.
Water-resistance notice: the stated rating assumes that the crown, pushers and seals are correctly secured and that the watch has passed a recent pressure test. Water resistance can decrease over time and should be checked periodically.
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