Patek Philippe
Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P
The Patek Philippe Cubitus Perpetual Calendar Skeleton (reference 5840P) is a 45 mm platinum watch with a blue dial. It runs on the automatic caliber 28-28 Q SQU with a 48-hour power reserve and is water resistant to 30 m. It was introduced in 2026 and is still in production.
Specifications
Case
- Reference
- 5840P
- Collection
- Cubitus
- Case size
- 45 mm
- Thickness
- 10 mm
- Case material
- Platinum
- Case shape
- Square
- Crystal
- Sapphire
- Water resistance
- 30 m
- Bracelet / strap
- Navy blue composite strap
Dial and bezel
- Dial
- Blue
Movement
- Movement
- Automatic
- Caliber
- 28-28 Q SQU (base 28-28)
- Power reserve
- 48 hours
- Frequency
- 21,600 vph
- Jewels
- 27
- Functions
- Perpetual calendar, Day, Date, Month, Leap year, Moon phase, 24-hour
Production
- Production
- 2026 – today (current)
Dial versions
This reference was made with these dials and finishes.
5840P Blue
5840P-001
Blue
How it compares within the Cubitus family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 5840P (This watch) | 45 mm | Platinum | Blue | 28-28 Q SQU | 2026– |
| 5821/1A-001 | 45 mm | Stainless steel | Green | 26-330 S C | 2024– |
| 5821/1AR-001 | 45 mm | Two-tone steel/18k rose gold | Blue | 26-330 S C | 2024– |
| 5822P | 45 mm | Platinum | Blue | 240 PS CI J LU | 2024– |
| 7128/1G | 40 mm | 18k white gold | Blue | 26-330 S C/434 | — |
| 7128/1R-001 | 40 mm | 18k rose gold | Brown | 26-330 S C | — |
About the Cubitus family
The Cubitus was launched in late 2024 as Patek Philippe's first new permanent collection in about 25 years. It takes the sporty, integrated-bracelet idea of the Nautilus into a squarer case with rounded corners, a horizontally embossed dial and alternating satin and polished finishes.
The first models were 45 mm: ref. 5821/1A in steel, ref. 5821/1AR in steel and rose gold, both with the automatic caliber 26-330 S C, and ref. 5822P in platinum with a grand date, moon phase and instantaneous day display. In 2025 Patek added smaller 40 mm models in white and rose gold, ref. 7128. As a recent line, Cubitus pieces trade mostly as near-new watches, so complete sets and protective stickers matter.
Quick answers
- What size is the Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P?
- The Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P has a 45 mm case, 10 mm thick.
- What movement does the Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P use?
- It uses the automatic caliber 28-28 Q SQU, with a 48-hour power reserve.
- How water resistant is the Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P?
- It is water resistant to 30 metres.
- Is the Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P still in production?
- Yes, it is a current reference.
- When did the Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P come out?
- It was introduced in 2026.
- What is the Patek Philippe Cubitus Perpetual Calendar Skeleton 5840P made of?
- The case is platinum. Bracelet or strap: Navy blue composite strap.
Catalog facts checked October 2026.