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SIHH 2019 Trend Report: Set a date with these perpetual calendar timepieces

You probably use Google Calendar to plan your time, but perpetual calendar timepieces offer an analogue alternative to keeping track of the days, weeks and months ahead.

SIHH 2019 Trend Report: Set a date with these perpetual calendar timepieces

Montblanc's Heritage Perpetual Calendar Limited Edition. (Photo: Montblanc)

A few weeks ago, we wrote about the SIHH timepieces that had the industry all abuzz. With the fair now done and dusted, we take a look at the new offerings that watch fans can look forward to once they’re made available later this year.

Kicking things off: Perpetual calendars, which are produced by horological heavyweights such as Audemars Piguet, Jaeger-LeCoultre and Vacheron Constantin, as well as Baume & Mercier, which is new to the calendar game.


Audemars Piguet's Code 11.59 Perpetual Calendar. (Photo: Audemars Piguet) Audemars Piguet is possibly the hottest subject of debate right now, thanks to the launch of its new Code 11.59 collection. Some appreciate the meticulous attention to detail, particularly on the case; while others lament the design of the dials.

Whatever you think of the new collection, however, it cannot be denied that Audemars Piguet makes both excellent watches and excellent perpetual calendars. It is the creator of the world’s thinnest perpetual calendar, the Royal Oak RD#2. And even though it was a concept watch that never went into production, it is undeniable proof of the brand's prowess.

The new Code 11.59 features the in-house Calibre 5134, which is still incredibly slim at 4.31mm, and includes an astronomical moon display that requires adjustment once every 122 years and 108 days.

This dial is also perhaps the most beautiful of the new Code 11.59 launches. It's made of sparkling aventurine glass, a material created by chance on the Italian island of Murano in the 17th century.


Baume & Mercier's Clifton Baumatic Perpetual Calendar. (Photo: Baume & Mercier)

Last year, Baume & Mercier hit a milestone, creating its first in-house manufacture movement. This year, it has topped said movement with a perpetual calendar module made by Dubois-Depraz to create the Clifton Baumatic Perpetual Calendar. The watch is also a value proposition for those looking for an entry-level perpetual calendar (if there even is such a thing).

Its in-house baumatic BM13-1975AC-1 movement has an impressive seven days of power reserve, and sports a silicon hairspring that imparts anti-magnetic properties to the movement, meaning that the movement is more precise than movements with a normal hairspring.


IWC's Big Pilot's Watch Perpetual Calendar Spitfire. (Photo: IWC)

IWC is doubling down on its in-house manufacturing expertise. Thanks to the new manufacturing facility that it opened on the outskirts of Schaffhausen last year, the firm is now able to increase its production of in-house movements. As of 2019, all movements in the Spitfire sub-collection are made in-house, including this Big Pilot's Watch Perpetual Calendar Spitfire.

Like all of IWC's in-house movements, Calibre 52615 is robust, with features such as a long seven-day power reserve (made possible by two barrels) and a winding mechanism made of wear-resistant ceramic. The movement incorporates the perpetual calendar module developed by IWC's legendary watchmaker Kurt Klaus, who turns 85 this year.

On top of the perpetual calendar function, the Big Pilot's Watch Perpetual Calendar Spitfire also has a double moon display that shows the moon in the correct position in the northern and southern hemispheres and will only need adjusting every 577.5 years. The case of the watch is crafted from bronze – a trendy material of late – and is offset with a green dial and white detailing.

Bronze will develop a special patina over time, but to ensure that the material does not react with the wearer's skin, the case back is made from titanium and sapphire crystal – the latter material also means that you can see the exceptional movement up close.


Jaeger-LeCoultre's Master Grande Tradition Gyrotourbillon Westminster Perpetuel. (Photo: Jaeger-LeCoultre)

The incredibly long name of this watch exists for a reason: On top of the perpetual calendar it also has a Westminster carillon minute repeater with crystal gongs, a multi-axis tourbillon that has been downsized for greater wearability, and a constant-force mechanism. Needless to say, this is an incredible mechanical achievement from Jaeger-LeCoultre.

The Westminster carillon minute repeater chimes the famous melody of the Big Ben clock at the Palace of Westminster in London. The Master Grande Tradition Gyrotourbillon Westminster Perpetuel uses four sets of gongs and hammers to chime the time when the minute repeater is activated, with the longest chime at 12:59 measuring 28s long. Such a minute repeater is among the most complex of its kind, and requires a high level of watchmaking know-how.

Jaeger-LeCoultre has been known for its multi-axis tourbillons – which it calls gyrotourbillons – for years now, with the first emerging in 2004. This particular specimen is the fifth that the brand has produced, and has been downsized from the previous smallest gyrotourbillon by an estimated 15 per cent (although that had been a flying gyrotourbillon, so a direct comparison is somewhat discouraged).

While this may not seem impressive at first, consider that the shrinkage involves much smaller tolerances and a greater need for precision engineering, while maintaining chronometric precision. All of this so that the rest of the complications can fit into the 43mm by 14.08mm case, and still be wearable.

Part of the precision is achieved by the constant force mechanism, which helps to provide a consistent level of power to the tourbillon without affecting its accuracy and precision.

In the Master Grande Tradition Gyrotourbillon Westminster Perpetuel, the constant force mechanism also conveys an additional advantage by regulating the minute wheel, resulting in a jumping minutes hand that offers greater precision in time display. This also cancels out the error that may occur when a minute repeater is activated between two different minutes.

Finally, the perpetual calendar indication also has a new innovation – for the first time for Jaeger-LeCoultre, the perpetual calendar can be set either forwards or backwards, unlike other such complications, which can only be set forwards.

MONTBLANCHERITAGE PERPETUAL CALENDAR LIMITED EDITIONMontblanc's Heritage Perpetual Calendar Limited Edition. (Photo: Montblanc)

Montblanc’s latest perpetual calendar offering is perhaps one of the best value propositions on the market. Not only are its aesthetics charming and elegant, with a hint of vintage appeal, it is also equipped with an excellent new MB 29.22 movement made in-house by its Minerva manufacture (which parent company Richemont Group purchased and accorded to Montblanc in 2004).

The layout of the new Heritage Perpetual Calendar is also much more well-spaced than the Meisterstuck Heritage Perpetual Calendar from 2014, its previous in-house perpetual calendar offering. This indicates that much care was taken in the creation of this new piece, with movement creators and aesthetics designers working in beautiful unison. The attention to detail such as light blue and gold detailing on the dial also make for a pleasing colour combination. 

Plus, a second time zone function has been added, in the form of a skeletonised hour hand. It also sits well on the wrist, measuring 40mm in diameter and 12.3mm in thickness – relatively slim for a perpetual calendar with a modular construction.


Vacheron Constantin's Traditionelle Twin Beat Perpetual Calendar. (Photo: Vacheron Constantin)

This watch is perhaps the most useful iteration of the perpetual calendar we've seen to date. One of the greatest pitfalls of perpetual calendars is that they must be kept constantly wound if they are to keep to their promise of only needing adjustment once every few hundred years. Given that many such watches have relatively small power reserves of less than two days, that proposition is quite tough indeed.

To tackle this problem, brands can add a second barrel to increase the power reserve (as with IWC above), or, as Vacheron Constantin has done with the Traditionnelle Twin Beat Perpetual Calendar, come up with an entirely novel solution.

The Traditionnelle Twin Beat Perpetual Calendar has two modes: active mode and standby mode, and the wearer can choose which mode the watch operates in. The difference between these two modes are the oscillation frequencies of the two balance wheels in the escapement – hence the name Twin Beat.

One of these balance wheels oscillates at a quick 5Hz (for active mode), and the other oscillates at a slow 1.2Hz (for standby mode). When on the wrist, the wearer should choose to keep the watch on active mode – since the higher oscillation means a greater level of precision – and enjoy some four days of power reserve.

When in storage, however, the owner can switch the watch to standby mode; the slower oscillation preserves the power reserve and allows the watch to continue ticking for at least 65 days. 

At any point during that time, the watch can be picked up again, and switched back to active mode with all of its calendar indications up to date. How's that for perpetual calendar?

Access is a collaboration between CNA Lifestyle and Singapore Tatler

Source: CNA/ds