Audemars Piguet 150 Heritage Ultra Complication Universal Calendar
The “Library of Time” created by Audemars Piguet to celebrate its 150th anniversary
In the world of Haute Horlogerie, the term “Complicated Watch” does not always mean it simply has many functions; rather, it refers to the integration of astronomical, engineering, and artistic knowledge to create a living machine. This is precisely the standout feature of the Audemars Piguet 150 Heritage Ultra Complication Universal Calendar REF. 75150PT.OO.01.
It is not an AP wristwatch, but an Ultra-complication pocket watch that AP intentionally crafted as a summary of the Le Brassus manufacture’s capabilities over the past century and a half.
If the Royal Oak is an icon of design,
The 150 Heritage is an “icon of all the knowledge AP possesses.”
The Beginning: A timepiece created to celebrate a 150-year legacy
The 150 Heritage was launched this year, 2026, to commemorate the 150th anniversary of Audemars Piguet. It is produced in an extremely limited quantity of 2 pieces in a platinum case and 8 pieces in white gold. Given this level of exclusivity, for those lucky enough to own one and preserve it well for decades to come, this AP timepiece may well become another world-class, highly valuable collectible.
Looking back at history, the reason AP chose to create a pocket watch instead of a wristwatch is likely because:
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Pocket watches were the origin of high complications in the 19th century.
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The format provides ample space to house a large number of mechanisms.
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It serves as a tribute to the pioneering era of watchmaking.
The Heart of This Timepiece: Calibre 1150
The Calibre 1150 is a manual-winding movement
Composed of as many as 1,099 parts
Providing a 60-hour power reserve
Featuring a complexity of 40 functions and 22 complications
(This information is as stated on the AP website, which differs from the classification in the full list provided by AP as a PDF file, which can be downloaded here: View the full list)
Examples of key functions, categorized for ease of understanding:
Sound complications
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Grande Sonnerie
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Petite Sonnerie
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Minute repeater
Chronograph
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Flyback chronograph
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Split-seconds (Rattrapante)
Regulation
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Flying tourbillon
Calendar
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Perpetual calendar
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Big date
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Leap year indication
Astronomical
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Moon phase
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Astronomical lunar indications
Universal Calendar: What makes this piece “unique”
The true highlight is not just the number of complications, but the Universal Calendar.
AP designed this mechanism as an independent system from the main movement.
The calendar systems displayed include:
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Solar cycle (Western calendar)
This is the system we use every day,
based on the Earth's orbit “around the sun.”
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1 year = 365 days
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Includes leap years to correct for discrepancies.
It is a highly accurate and practical system
as it is directly tied to the “seasons.”
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Lunar cycle (Islamic calendar)
This system is based on the “lunar phases.”
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1 month = 29.5 days
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1 year = 354 days
Which is about 11 days shorter than a solar year.
The result is that important dates “shift” every year.
While it may not seem practical for daily use,
It is essential for religious, cultural, and traditional events, such as:
The month of Ramadan or the Islamic Hajj pilgrimage,
The Mid-Autumn Festival,
Or for professions tied to nature, such as fishermen monitoring the tides.
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Lunisolar cycle (Chinese calendar)
This is the “smartest” system of the three.
It uses the “moon” to determine the length of the months.
It uses the “sun” to ensure the year remains in sync with the seasons.
However, 12 months in a lunar cycle equal 354 days,
Which is an 11-day difference from the solar cycle (365 days) we are familiar with.
Therefore, a “13th month” must be added based on a cycle calculated every 19 years.
(I will provide only a brief explanation to give you an idea, as this system is extremely complex.)
Through these three calendar systems,
It is as if AP is demonstrating human diversity in interpreting
That construct we call “time.”
Even though the perspectives differ, they coexist without conflict.
An artistic work that is both beautiful and refined
If you turn the case over, you will see engraving covering the entire surface.
Case:
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Platinum hand-engraved
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50 mm in size
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23.4 mm in thickness
Dial:
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Translucent Blue Grand Feu Enamel
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White gold Roman numerals
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Pink gold hands
Chain:
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Hand-made platinum chain
Not just a watch, but a statement
If you ask who would ever use all these complications,
The answer is practically no one.
It is likely akin to Ferrari building a hypercar—
Not for sales volume, but to proclaim its potential and mastery.
The same applies to this timepiece,
Which AP created to tell the world,
“This is what we are capable of.”
And this is another story from the world of time that Pixiu Watch wanted to present.
We hope you enjoyed reading it until the end.
If you are interested in pre-owned, high-quality AP watches from Pixiu Watch, you can browse and check prices at https://pixiuwatch.com/collections/audemars-piguet-มือสอง
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If you want to “sell an authentic designer watch” or “sell a pre-owned watch online,”
Let us take care of you professionally through the following channels:
Contact PIXIU WATCH for consultation and a free appraisal!
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Phone: 096-939-9292, 083-713-9292
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References
- https://www.audemarspiguet.com
- https://monochrome-watches.com
- https://www.fratellowatches.com
- https://revolutionwatch.com
- https://www.hodinkee.com
- https://watchesiam.com
- https://hypebeast.com
