Patek Philippe Annual Calendar Chronograph, Stainless Steel Case, Ref. 5960/1A-001

The Patek Philippe Annual Calendar Chronograph will be available in a cool yet masculine stainless steel version, a rare trend among the manufacture’s complication timepieces.

Thanks to this rarity, the new Ref. 5960/1A Annual Calendar Chronograph in steel will definitely capture the attention of collectors and brand aficionados.

Introduced in 2006, the Patek Philippe Annual Calendar Chronograph in platinum was the manufacture’s first self-winding chronograph, manifested a new and unique style with its prominent monocounter and three large calendar apertures, and quickly established itself as one of the most coveted timepieces of the Patek Philippe portfolio.

The success story continued with further versions in platinum and rose gold. The Annual Calendar Chronograph in stainless steel is not only the latest sibling of its lineage but will also replace all current gold and platinum versions. The letter “A” in the model designation 5960/1A stands for acier (steel in French).

Patek Philippe Annual Calendar Chronograph, Stainless Steel Case, Ref. 5960-1A
Patek Philippe’s stainless steel watches have always ranked among the most desirable timepieces because they were crafted only in small numbers. They were not regularly produced until 1976, when the manufacture introduced the casually elegant Nautilus line.

Twenty years later, the attractively stylish Aquanaut was also endowed with a stainless steel case. With very few exceptions – such as the ultra-thin Ref. 5950A split-seconds chronograph which has been in the collection since 2010 – all other Patek Philippe men’s wristwatches were systematically cased in gold or platinum. As regards this strict distinction between casual and classic watches, the new Ref. 5960/1A is another one of these seductive exceptions.

The new stainless steel case imbues the coveted Annual Calendar Chronograph with authoritative technical finesse that melds classic elegance with masculine sportiness. It emphasizes the active and dynamic nature of the chronograph and underscores its function as a convenient timekeeping instrument of everyday utility.

Nonetheless, the new Ref. 5960/1A has a decidedly elegant nimbus attributable to the balanced, gently rounded case contours and the superb finishing touches that reflect the competence of Patek Philippe’s casemaking ateliers. Here, polishing is executed with scientific precision.

The artisans are required to accrue several years of experience before being entrusted with the finissage of the manufacture’s cases. Because of its hardness, stainless steel challenges the skills of the case specialists and imposes special requirements on their tools. It takes much longer than a gold case would to polish a steel case with consecutively finer abrasives until it reflects light with an immaculate sheen.

The elegance of the case also comes to the fore at the sublime transition to the signature bracelet with its five rows of “drop” links. It is eminently supple and of filigreed elegance. Developed by Patek Philippe, this bracelet was first introduced in 1997 for the Ref. 5036/1 Annual Calendar and now celebrates its debut in stainless steel.

The new silvery-gray dial boasts striking red accents, interesting bright-dark contrasts, and the dynamic, performance-oriented looks of its explicitly three-dimensional architecture. An uncommon feature in a Patek Philippe watch: the red “1” in the date aperture, which kicks off each month with a colorful stimulus while the dates from the 2nd to the 31st days are displayed black on white.

It is a genuine premiere for Patek Philippe, as is the combination of an Annual Calendar chronograph with a steel case and the stainless steel “drop” links bracelet that underscores the functionality of the Ref. 5960 as a measuring instrument.

Thirteen appliques in black oxidized gold produce the expressive 3D effect: the chronograph scale on the periphery of the dial with twelve luminous five-minute markers, the three distinctively contoured frames for the aperture displays of the day, date, and month, the eight pointed-baton hour markers, each with three facets and a recessed sink at the flat end, as well as the 12-hour counter scale at 6 o’clock.

Additionally, the dial features two printed concentric chronograph minute counter scales (0 to 30 and 30 to 60 minutes) within the applied hour counter scale, a small day/night indication at 6 o’clock, and the minus and plus symbols for the power-reserve indicator beneath the date aperture.

Patek Philippe Annual Calendar Chronograph, Stainless Steel Case, Ref. 5960/1A-001

The redesigned hands of the Ref. 5960/1A accentuate the dynamic elegance of the watch. The hour and minute hands in black oxidized gold feature three facets to match the hour markers and have a luminescent coating to improve legibility at night.

The brass hour-counter hand is black nickel-plated to match the applied counter scale. The large counterbalanced chronograph hand in steel and the small minute-counter hand in brass are bright red as dynamic hints that they are used for measurements in competitive sports. The power reserve hand in black nickel-plated gold was redesigned as well. It is now somewhat wider and skeletonized.

The hands and the calendar displays are powered by the Patek Philippe CH 28-520 IRM QA 24H caliber with flyback chronograph and Annual Calendar as well as power-reserve and day/night indications. It beats with a frequency of 28,800 semi-oscillations per hour (4 hertz), which assures constant balance amplitude and thus high rate accuracy. A heavy central rotor in 21K gold winds the watch automatically.

The movement is a prime example of tradition paired with innovation. It combines the classic columnwheel control concept with a modern vertical disk clutch that eliminates the risk of hand jump or recoil when the stopwatch function is activated. The clutch is practically friction-free, so that the chronograph hand can be used as a permanently running seconds hand if desired.

The patented Spiromax® balance spring made of Silinvar® is another innovative feature. Its isochronous oscillation, low mass, antimagnetic properties, and unique geometry assure high rate stability and uniformity. These are ideal prerequisites for the fulfillment of the Patek Philippe Seal precision criteria which for mechanical movements of this size tolerate a rate deviation of no more than -3 to +2 seconds per day.

This rate accuracy also benefits the patented Patek Philippe Annual Calendar, a modular ensemble that is a scant 2.48 mm high despite its 154 parts. Displaying the first day of the month in red, the calendar automatically recognizes months with 30 and 31 days and only needs to be manually corrected by one day on March 1 of each year.

With its elegance and technical panache, Patek Philippe’s new Annual Calendar Chronograph 5960/1A is destined to become a bestseller that derives fresh charisma from the noblesse and cool luster of stainless steel.

As of this year, it replaces all Ref. 5960 Annual Calendar Chronographs in gold and platinum.

Technical details

Model: Patek Philippe Annual Calendar Chronograph Ref. 5960/1A-001

Movement
Caliber CH 28-520 IRM QA 24H: Self-winding mechanical movement, chronograph with column wheel,  Annual Calendar, power-reserve indicator, day/night indicator, sweep chronograph hand
Diameter: 33 mm (basic movement 30 mm, calendar module 33 mm)
Height: 7.68 mm (movement 5.20 mm, calendar module 2.48 mm)
Number of parts: 456 (movement 302, calendar module 154)
Number of jewels: 40 (movement 35, calendar module 5)
Power reserve: Min. 45, max. 55 hours
Winding rotor: Central rotor in 21K gold, unidirectional winding
Balance: Gyromax®
Frequency: 28,800 semi-oscillations/hour (4 Hz)
Balance spring: Spiromax®

Winding crown

Two crown positions:
– Pulled out: To set the time
– Pushed in: To wind the watch

Displays
Center hour and minute hands
Sweep chronograph hand   Power-reserve indicator at 12 o’clock Monocounter at 6 o’clock
–  60-minute counter (display on two concentric scales from 0 to 30 and from 30 to 60 minutes)
– 12-hour counter

Aperture displays:
– Day of week between 10 and 11 o’clock in diamond-polished and black galvanized 18K white-gold frame
– Date at 12 o’clock in diamond-polished and black galvanized 18K white gold frame; display of first day of each month with a red “1”, date numerals from “2” to “31” in black
– Month between 1 and 2 o’clock in diamond-polished and black galvanized 18K white-gold frame
– Day/night indicator at 6 o’clock

Pushers: 
– Chronograph start and stop at 2 o’clock
– Chronograph reset and flyback function at 4 o’clock

Correctors:  
– Day at 9 o’clock
– Date between 9 and 10 o’clock
– Month at 10 o’clock

Hallmark
Patek Philippe Seal

Case
Stainless steel
Sapphire-crystal glass and caseback
Water-resistant to 30 m
Diameter: 40.50 mm
Diameter across crown: 43.20 mm
Height: 13.55 mm
Width between lugs: 21.20 mm

Dial
Two-tone style, ebony black and silvery opaline
Eight applied pointed-baton hour markers in black oxidized white gold, new design with three facets and a sink at the outer end
Applied ebony-black oxidized chronograph scale with twelve luminescent five-minute pearls
Hour and minute hands in black oxidized 18K white gold, new design with three facets and luminous coating
Chronograph hand in steel, counterbalanced, lacquered in red
Baton-style power-reserve indicator hand in 18K white gold, skeletonized and black nickel-plated
Subsidiary dial with hour-counter scale on ebony-black oxidized applique in 18K white gold
Baton-style hour-counter hand, counterbalanced, black nickel-plated brass
Baton-style minute-counter hand, brass, lacquered in red

Bracelet
Stainless steel, with Patek Philippe “drop” links and stainless steel fold-over clasp

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