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Patek Philippe Annual Calendar Flyback Chronograph 42mm Platinum
Ref. 5905P-001
Introduced at Baselworld in 2015, the 5905P succeeded the well-regarded 5960 and sharpened the formula in one deliberate move: swapping the older pump-style pushers for rectangular ones that sit flush and crisp against the case. Beneath that, the CH 28-520 QA 24H does something genuinely difficult — a vertical-clutch flyback chronograph and Patek's patented annual calendar running together in a single automatic movement, with calendar corrections made through push-pieces integrated directly into the case flank rather than via a pin through the dial. At 130.3 grams in solid platinum the 5905P has real presence on the wrist, but the scalloped lugs and concave bezel pull the 50.2mm lug-to-lug span into the wrist rather than sitting proud of it, so the weight distributes better than the figure suggests. The sunburst blue dial deepens or lightens depending on the angle, and the matte navy alligator strap is pitched correctly against it — close enough in tone to read as a considered pair, different enough to hold the contrast. The detail most owners find later is the diamond set into the case rim between the lugs at six o'clock — Patek's discreet marker for platinum, invisible from the front, there to be noticed only by someone who already knows to look.
- Reference
- 5905P-001
- Brand
- Patek Philippe
- Case size
- 42mm
- Case thickness
- 14.03mm
- Case material
- White gold
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- CH 28-520 QA 24H
- Functions
- Chronograph, Day-date
- Water resistance
- 30m
- Bracelet / strap
- Leather strap
- Strap colour
- Blue
- Clasp
- Buckle
- Lume
- Luminous
- Condition
- Pre-owned
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 50.2mm
- Power reserve
- 55 hours
- Gem set
- Yes
Learn more about Patek Philippe
Antoine Norbert de Patek, a Polish cavalry officer exiled after the November Uprising, founded a watch business in Geneva in 1839 with his countryman François Czapek. The partnership dissolved after six years, and in 1845 Patek took on the French watchmaker Adrien Philippe, inventor of the keyless winding crown. The firm became Patek Philippe in 1851.
That single invention mattered more than any other in the company's early history: it removed the winding key, and every modern watch descends from it. Queen Victoria bought a Patek pendant watch at the Great Exhibition the same year, establishing the royal patronage the house has traded on ever since.
The Stern family, dial manufacturers and long-standing suppliers, bought the company in 1932 during the Depression. Four generations later it remains in their hands — the last independent family-owned manufacture in Geneva, currently led by Thierry Stern.
Patek's reputation rests on complications: the Calibre 89 of 1989 carried thirty-three of them, and the Grandmaster Chime remains among the most complicated wristwatches made. The Nautilus, drawn by Gérald Genta in 1976 as a steel luxury sports watch, became an unlikely commercial phenomenon four decades after launch.
Production stays deliberately modest, in the tens of thousands annually, and every watch carries the Patek Philippe Seal, an in-house standard the company adopted in 2009 after abandoning the Geneva Seal as insufficiently strict.
- 1839
- Antoine Norbert de Patek and François Czapek found the firm in Geneva.
- 1845
- Adrien Philippe joins, bringing the keyless winding crown.
- 1851
- The company is renamed Patek Philippe; Queen Victoria buys a watch.
- 1932
- The Stern family acquires the company.
- 1976
- The Nautilus debuts, designed by Gérald Genta.
- 2009
- The Patek Philippe Seal replaces the Geneva Seal.
Also in 6 collections
This watch appears in Automatic Watches (1,366), Chronograph Watches (1,034), Leather Strap Watches (841), Blue Dial Watches (690), Pre-Owned, Ex-Display & Vintage Watches (240) and Solid Gold Watches (94).
2-year Goldsmiths warranty
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Worth knowing
- 30m means keeping it away from water
- 14.03mm thick, so it will not disappear under a cuff
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 5905P-001 | 26240OR.OO.D315CR.01 | 4500V/110R-B705 |
|---|---|---|---|
| Price | £65,450 | £74,450 | £50,950 |
| Case size | 42mm | 41mm | 41mm |
| Water resistance | 30m | 50m | 150m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Leather strap | Leather strap | Leather strap |
| Power reserve | 55 hours | — | 60 hours |
| This watch |
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Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
No. At 30m it will survive rain and handwashing, but not submersion of any kind.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
How long does it run for when it's not worn?
About 55 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
Will it fit my wrist?
Lug-to-lug is 50.2mm, which suits wrists from roughly 17.5cm (7 inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Goldsmiths at £65,450, pre-owned. No UK retailer we track lists this reference new.
Is this available new?
Not from the UK retailers we track. This reference is listed as pre-owned only, at £65,450 from Goldsmiths. Goldsmiths test every pre-owned watch for authenticity, timekeeping and water resistance, and warrant it for 2 years — the same term they give on a new watch.
Who are Goldsmiths?
Goldsmiths has been selling watches in Britain since 1778 and is part of the Watches of Switzerland Group, which is listed on the London Stock Exchange. They are an authorised dealer, so a watch comes with the manufacturer’s own warranty.
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