The Patek Philippe Reference 5960 is one of the most significant watches in the brand's modern catalog — the first Patek Philippe wristwatch to combine a self-winding movement with both an in-house chronograph and the brand's patented annual calendar complication. The 5960/01G-001 is the 18-karat white gold execution with a deep blue dial, a 40.5mm case, an open caseback, and the in-house Caliber CH 28-520 IRM QA 24H. This deep-dive walks through the 5960's place in Patek Philippe history, the annual calendar and chronograph complications, the technical specifications of this exact reference and the architecture of the movement.
A Brief History of the Reference 5960
When Patek Philippe introduced the Reference 5960 in 2006, it marked a genuine first for the manufacture. Patek had produced chronographs for over a century and had pioneered the annual calendar — a complication that automatically accounts for months of 30 and 31 days, requiring correction only once per year at the end of February — with the Reference 5035 in 1996. But the 5960 was the first time Patek Philippe combined a fully in-house automatic chronograph movement with the annual calendar in a single wristwatch. It was also the first Patek Philippe to house the then-new Caliber CH 28-520, the manufacture's first self-winding chronograph movement developed entirely in-house.
The original 5960 launched in platinum with a black-and-silver dial (Reference 5960P), positioned within Patek's Complications collection rather than the Grand Complications. Over the following years, Patek expanded the line into rose gold, white gold, and yellow gold, with a range of dial colors and the distinctive single sub-dial layout that combined the chronograph counters and the day-night indicator into one register at 6 o'clock. The 5960/01G-001 — the white gold, blue-dialed execution — sits within this expansion of the reference.
In 2014, Patek revised the line into the 5960/1A in stainless steel on a bracelet, and the reference has continued to evolve. The white gold 5960/01G with the blue dial, of which the 2017 Forever Rox example is one, represents the precious-metal, leather-strap expression of the reference — the configuration most associated with the 5960's identity as a refined, wearable Patek complication rather than a sport watch. For Patek Philippe's own framing of the Complications collection the reference belongs to, the manufacture's Complications catalog provides the current reference point.
The Annual Calendar: Patek Philippe's Signature Complication
The annual calendar is the complication Patek Philippe invented, and it is the heart of the 5960. Patented in 1996, the annual calendar is a mechanical middle ground between the simple date function — which requires manual correction five times a year, after every month shorter than 31 days — and the perpetual calendar, which never needs correction but is mechanically far more complex and expensive. The annual calendar automatically distinguishes between 30-day and 31-day months, requiring a single manual correction each year, on March 1st, to account for February's 28 or 29 days.
On the 5960/01G, the annual calendar is displayed through three apertures arranged across the upper half of the dial: the day of the week in a window at roughly 9 o'clock, the month in a window at roughly 3 o'clock, and the date in a large aperture at 12 o'clock. This three-window layout is a deliberate Patek Philippe design signature, tracing directly back to the original 5035 of 1996 and giving the 5960 immediate visual identification as a member of the annual calendar family. A small day/night indicator is integrated into the dial as well, helping the wearer set the calendar correctly relative to the 24-hour cycle.
The practical appeal of the annual calendar is precisely its balance. It delivers most of the convenience of a perpetual calendar — set it once and largely forget it — without the perpetual's mechanical density, service cost, and setting fragility. For a watch intended to be worn regularly rather than vaulted, the annual calendar is arguably the most sensible calendar complication Patek Philippe makes.
The Chronograph and the Single Sub-Dial Layout
The 5960's chronograph is a column-wheel design with the chronograph functions read through a single combined sub-dial at 6 o'clock. This is one of the reference's most distinctive design decisions. Rather than scattering the chronograph counters across multiple sub-dials, Patek consolidated the chronograph's 60-minute and 12-hour counters into a single register, displayed as two concentric scales within one sub-dial. The result is a dial that carries a chronograph, an annual calendar, and a day/night indicator without feeling cluttered — the lower half of the dial handles the chronograph, the upper half handles the calendar, and the central area stays clean for the time.
The central chronograph seconds hand sweeps from the middle of the dial, finished in bright red on the blue-dialed 5960/01G — the single boldest color accent on the watch, deliberately contrasting against the deep blue dial and the white-gold-toned hands and markers. The chronograph is operated by two rectangular pushers flanking the crown, with the upper pusher controlling start and stop and the lower pusher controlling reset.
There is also a power reserve indicator integrated into the dial, displayed as a small linear or arc indicator near the center, marked with a "+" and "−" to show the state of wind. The CH 28-520 carries enough running autonomy that the power reserve indicator is a genuinely useful daily reference rather than a decorative flourish.
The 5960/01G-001 Case, Dial, and Crystal
The case of the 5960/01G-001 is 40.5mm in diameter, machined from 18-karat white gold, with the polished and brushed surfaces and the gently curved lugs that define Patek's Complications-collection case language. The case carries a thickness of approximately 13.5mm. This is a precious-metal dress complication, not a sport watch — the proportions are designed to sit cleanly under a cuff while still carrying enough wrist presence to display its three-window calendar and combined chronograph register clearly. The crown is signed with the Patek Philippe Calatrava cross, and the two chronograph pushers are rectangular, in keeping with the reference's design.
The dial is a deep blue with white accents — applied white-gold hour markers, white-gold hands, and the three calendar apertures with white backgrounds that stand out crisply against the blue. The "PATEK PHILIPPE GENEVE" signature sits below the 12 o'clock date aperture. The outer edge of the dial carries a printed scale, and "SWISS MADE" runs along the lower edge near the 6 o'clock sub-dial. The blue dial on the white gold case is one of the most visually cohesive configurations in the 5960 family — the cool tone of the white gold and the cool tone of the blue dial reinforce each other, with the red chronograph hand providing the single point of warm contrast.
The crystal is sapphire, and — critically for a watch built around an in-house chronograph movement — the caseback is also sapphire, displaying the Caliber CH 28-520 IRM QA 24H. This is an open-caseback reference, which means the movement is meant to be seen.
The Caliber CH 28-520 IRM QA 24H Movement
Under the sapphire caseback, the 5960/01G runs the Patek Philippe Caliber CH 28-520 IRM QA 24H — a self-winding chronograph movement developed entirely in-house, and the reference movement that defined the 5960 from its introduction. The lengthy designation decodes in Patek's house convention: "CH" for chronograph, "28-520" for the movement family and diameter, "IRM" for indicateur de réserve de marche (power reserve indicator), "QA" for quantième annuel (annual calendar), and "24H" for the 24-hour day/night indication.
The movement is a column-wheel chronograph with a vertical (disc) clutch — the modern high-horology standard for chronograph engagement, eliminating the slight jump of the chronograph seconds hand on start that characterizes older horizontal-clutch designs and allowing the chronograph to be run continuously without meaningful additional wear. The CH 28-520 carries 456 components and 40 jewels, beats at 28,800 vibrations per hour (4 Hz), and holds a power reserve of approximately 55 hours. The automatic winding is driven by a 21-karat gold central rotor, visible through the caseback.
The movement carries the Patek Philippe Seal — the manufacture's own standard of certification, which Patek adopted in 2009 to replace its reliance on the Geneva Seal. The Patek Philippe Seal governs not only the movement's finishing and construction but also its rate accuracy (Patek's standard is -3/+2 seconds per day for movements of this size), its long-term serviceability, and the performance of the complete watch including case and dial. Finishing on the CH 28-520 follows Patek's standard for the Complications collection: Côtes de Genève on the bridges, polished bevels, perlage on the mainplate, and the column wheel and chronograph levers finished to be appreciated through the sapphire caseback.
The Reference Decoded: 5960/01G-001
Patek Philippe's reference numbering encodes the model, the execution variant, the case material, and the dial configuration. For ref. 5960/01G-001:
5960 identifies the model — the automatic annual calendar chronograph, introduced in 2006.
/01 designates the specific execution variant within the 5960 family — in this case, the precious-metal, leather-strap configuration with the applied hour markers and the dial layout of this generation.
G designates the case material — or gris, French for white gold. Other letters in the 5960 family indicate other materials: P for platinum (the original 5960P), R for rose gold, J for yellow gold, and A for the later stainless steel 5960/1A.
-001 is the dial and configuration suffix — here, the blue dial with white accents.
Knowing the full reference is the cleanest way to distinguish this exact watch from the other 5960 executions, which can look broadly similar in catalog photos but differ in case metal, dial color, and strap or bracelet configuration.
Strap and Wearability
The 5960/01G-001 ships on Patek Philippe's blue alligator leather strap, matched to the blue dial, with blue stitching and finished with an 18-karat white gold Patek Philippe pin buckle signed with the Calatrava cross. The strap-and-buckle combination keeps the watch firmly in dress-complication territory — there is no bracelet option on this precise reference, and the leather strap is integral to the watch's identity.
At 40.5mm in diameter and approximately 13.5mm thick, the 5960 wears as a substantial but not oversized complication. It is larger than a classic Calatrava and carries more dial information, but the case proportions and the curved lugs keep it wearable across a wide range of wrist sizes. On a 7-inch wrist it sits cleanly with room to spare; on a 6.5-inch wrist it remains comfortable without overhanging. The white gold case carries real weight — white gold is denser than steel — which gives the watch a reassuring presence on the wrist that photographs cannot fully convey. It is a watch designed to be worn with a jacket, but the blue dial gives it enough visual character to carry less formal wear as well.
The Example Currently in the Forever Rox Fine Jewelry Showcase
We currently have a 2017 example of reference 5960/01G-001 in our case at 930 Tahoe Blvd. in Incline Village. The piece is in like-new used condition with the full set: original Patek Philippe box and papers. The 40.5mm 18-karat white gold case is clean with its original polished and brushed surfaces intact, the blue dial is original and unrestored with all three calendar apertures, the combined chronograph sub-register, and the red chronograph seconds hand correct and crisp, and the watch retains its original Patek Philippe blue alligator strap with the signed 18-karat white gold pin buckle. The Caliber CH 28-520 movement runs to Patek Philippe Seal specification and is fully visible through the sapphire caseback.
