Jean-Claude Biver’s Own Hallmark of Quality – The JCB Seal Explained (And How it Differs From The Patek Seal)
Jean-Claude Biver is a figurehead which many know and associate with watchmaking in this day and age. A huge collector in his own right, he was integral in the turnaround of the Blancpain brand, as well has having held positions of power at the likes of Omega and Hublot. Eventually he went on to create his own brand together with his son Pierre called ‘Biver’, in 2022. What many don’t know, along with this was established the JCB seal, which aims to ‘guarantee fine hand-crafted workmanship in the purest Swiss watchmaking tradition’. The JCB seal is broken down into four key aspects: Movement, exterior, testing and warranty. We have examined the key criteria of the JCB seal and compared it to the Patek seal, which is widely respected for one of the strictest quality certifications in the watch industry.
Movement
The movement aspect revolves predominantly around the techniques used to construct and finish components within the movement. This is broken down into steel parts, arbors, wheels, bridges, escapement, pins, screws, tourbillon and referencing. Steel parts must have either mirror finished or straight grained surfaces with satin-brushed flanks. As well as this, any functional surfaces or chamfers must be polished, including screw and pin countersinks. Springs must be made from spring steel rather than other short cut methods. Regarding arbors, there are numerous rules, such as the requirement for pivot tips to be dome polished and their surfaces to be burnished. Hand finishing is not a requirement for some of these parts that Biver produces, but preferable certainly it remains. Let’s be honest, one would expect no less.
Bridges must also be meticulously decorated, with surfaces in a variety of possibilities ranging from Côtes de Genève all the way to sunray finishing. Once again flanks must be satin-finished and with polished chamfers and countersinks. The JCB Seal goes into greater detail with the finishing of surfaces than the Patek Philippe Seal, but Patek certainly doesn’t cut and corners as finishing is applied to the vast majority of components even with entry level pieces, albeit with no hand finished touches are applied in this instance. Escapements in watches certified with the Biver seal are subject to perhaps the most requirements. The escape wheel index assembly must bear a high-end adjustment system and be mirror polished along with the pallet fork, and chamfers.
The balance wheel must have a variable inertia, such as a Gyromax, and have a system designed to absorb shock. As well as this, when it comes to tourbillon escapements, the JCB seal layers extra requirements. For example, a titanium construction is preferable in order to simultaneously reduce weight and increase performance, which is what titanium does best. Tourbillon bridges and cage plates are decorated with the highest standard of finishing. Any oscillating weights must be made from gold or platinum and be bidirectional. Finally, winding of the crown must be a pleasurable experience, which is a small touch that goes a long way. For Patek, a Gyromax isn’t required as the manual movements that are used in pocket watches don’t feature it. However, it is used across all the automatic movements. Tourbillon movements also have a higher standard of requirements, as their daily tolerance range must be no greater than -1/+2 seconds per day, irrespective of the diameter of the movement.
Exterior
The exterior aspect looks at the case, hands, dial, gem-setting and water resistance of the watches that leave Biver’s workshop. Starting with functionality, the case must be sealed and secured with screws both from the bezel and the case back side, meaning Biver does not allow for any snap-on or screw-down case backs as these represent a lower standard of engineering, making it harder to reach the desired 50 metres water resistance which applies even when the crown is pulled out. Furthermore the water resistance at the JCB seal also applies for chiming watches, which is almost unmastered in watchmaking. This is quite the contrary to Patek Philippe, having produced some of its most iconic watches with snap-on or screw-down case backs. To this day it continues to produce them as part of the current collection.
As well is this and on a more decorative note, Biver cases cannot be surface coated in any way. This includes the likes of DLC or PVD coating, which often scratches off and is a more cost-effective way of achieving a desired look. Unlike Patek, the hands on all watches certified by the JCB Seal must be made from 18-carat gold or stainless steel when blue fired, which can only be done using traditional techniques. The only time these rules don’t apply is when the hands are subject to ‘significant mechanical stresses’, such as those experienced by a chronograph hand. Just like hands, indexes and windows must also be made from 18-carat gold.
Any gem-setting used on the dial or case, or anywhere else for that matter, must be flawless, just like that of Patek Philippe, with in Biver’s instance gemstones of a clarity no less than VVS1 and a colour rating between D and F.
Testing
For all cased watches, the testing process covers and certifies five important factors: Water resistance of 50 metres (also applies for chiming watches), accuracy equal to or greater than COSC requirements, as well as functionality, and aesthetics. Whilst the water resistance trumps that of the Patek Philippe Seal, the accuracy standards of COSC are much lower. Patek not only has a variety of different accuracy standards for different movements but surpasses the JCB seal in accuracy by at least one second per day even for its least accurate movements (those without tourbillon and diameters less than 20mm). In terms of power reserve, the watch must equal as a minimum the stated power reserve of the caliber. On the Carillon that is a minimum of 72 hours but may be different for different calibers. As a note: the record in testing for the Carillion is 101 hours.
Warranty
Only a three-year warranty is issued on watches certified by the JCB seal, compared to the recently introduced five-year warranty from Patek Philippe. However, quite like watches made by Patek, those from Biver are repairable throughout their entire lifetime in order to guarantee that they are not perishable goods. To see all criteria of the JCB seal and Patek seal please see here:
Launched in 2011, following the Big Bang, King Power, and Classic Fusion lines, Hublot's Masterpiece (MP) collection marked the brand's intensified focus on grand complications. Jean-Claude Biver, then CEO of Hublot, described the collection as the next step towards "more watchmaking, more expertise, more innovation." From then on, 30 employees dedicated to grand complications brought…
Discussing prices may be frowned upon in haute horlogerie, but taking a look at the figures helps to illustrate how wide the range is in the Patek Philippe portfolio, and how diverse the expectations of its clientele are for the annual novelties. In 2023, the price starts at 37,219 Swiss francs and ends at 4,264,995…
While many of us will admittedly be glad to bid farewell to 2020, the watch community will nevertheless be looking back fondly on the wonderful mechanical creations to emerge from this unusual year. That's why, here at Swisswatches Magazine, we compiled a list of our favourite timepieces to come out of the horology industry in…
Salmon are impressive fish, facing a substantial amount of danger throughout their lives. This "danger" applies primarily to the fact that they are on the menu for a broad variety of animals along the food chain. After all, salmon aren't just nutritional (not to mention delicious) for humans alone. Whether salmon qualifies as a delicacy…
The Wempe branch on Munich’s Weinstrasse has been an integral part of the city for half a century, and has been managed by Marc Autmaring since 2009. Over the past 14 years, the engaging and determined manager has succeeded in further developing the location, tapping into new target groups and promoting close cooperation with renowned…
When I visited the Zenith manufacture in Le Locle a few years ago, I discovered a wall lined with certificates in the stairwell. They were just some of the many original certificates that the watchmaker had won in the chronometry competitions organised by the Neuchâtel Observatory. In total, there are 2,333 chronometry prizes - more…
Luxury: what is it? What is it that so entices us to invest our money in it? At every restaurant, on every train, every street, you will most likely see somebody indulging in a luxury product or experience. A mechanical watch, a world-class hotel, a vintage car – the list is endless. But why do…
Another year around the Sun; another year of ethereal, complex Reverso models as well as several handsome new iterations of the Reverso Tribute. Let’s jump right in. Another stunner: Limited edition white-gold Reverso Hybris Artistica The Reverso Hybris Artistica Calibre 179 represents the pinnacle of Jaeger-LeCoultre’s expertise, blending technical mastery with exquisite craftsmanship. Now reinterpreted…
At first glance, the Vaucher Manufacture Fleurier looks like your archetypal Swiss watchmaking manufacture. Bright, modern white rooms play host to advanced machines, exquisite movement decorations are proudly displayed in all their glory, employees pose by solar panels citing sustainability pledges. Yet, beneath this spotless exterior lies a complex and highly sought-after entity within the…
We have all heard of King Arthur, whose name conjures up an early medieval world of knights, magicians, and damsels in distress. Most importantly for us, though, is his famed inner circle: the noble Knights of the Round Table. It is to this knightly fellowship that ever-creative Swiss horology house Roger Dubuis dedicates its most captivatingly creative watch of all – the Excalibur Knights of the…
Vacheron Constantin makes no secret of the significance of its Patrimony collection for the maison. The name itself, ‘Patrimony’, speaks to the brand’s heritage, evoking a deep legacy of history, emotion, responsibility, and a commitment to carry that legacy forward. When the horology house from Geneva first decided to launch the collection twenty years ago,…
Sometimes the most simple ideas eventually lead to the greatest changes. At this years watch fair SIHH 2019, the oldest watch manufacture in the world, Vacheron Constantin surprises with a new power reserve technique that appears to be fairly simple, but is extremely complicated in its mechanical implementation. Neat crafting – the 480 components fit into…
Swatch Group founder Nicolas G. Hayek had a perceptive intuition for traditional watchmakers of which horological heritage has been ageing little over the years and he had a strong demand to keep the Swiss watch industry alive – thus, his attention was besides Abraham-Louis Breguet and Jehan-Jacques Blancpain also on Pierre Jaquet Droz, the ingenious…