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Ferdinand Berthoud Chronomètre FB 1L, An Instrument of Astronomical Complexity

Ferdinand Berthoud Chronomètre FB 1L, An Instrument of Astronomical Complexity


The most recent “experimental collection” uncovered by Ferdinand Berthoud during Baselworld 2019 joins the discoveries of two essential logical personalities of the Enlightenment. Closer in nature to an instrument than a watch, two restricted versions of 10 pieces commend the virtuoso of pioneers Ferdinand Berthoud and Jean-Charles de Borda, men whose revelations and mission for chronometric exactness and the figuring of longitude changed the course of history and gave France’s Navy influence of the seven oceans. This year, the Chronomètre FB 1 with its in-house tourbillon development and steady power escapement consolidates the age and periods of the Moon to become the Chronomètre FB 1L (L for lune, French for moon). A combination of astronomic and chronometric exactness, the FB 1L addresses the advancement logical undertakings that decided longitude adrift with consistently expanding precision three centuries ago.

Expanding the Chronomètre FB 1 Fleet

Just in front of the Baselworld dispatch, Brice presented the new FB 1L watches and clarifies the development of the Chronomètre FB 1 armada over the previous years, propelled by the quintessential accuracy of Ferdinand Berthoud’s marine chronometers. On the off chance that you recall, the FB 1 Chronomètre won the pined for Aiguille d’Or prize at the 2016 GPHG , only one year after the brand delivered its first watch; a wonderful accomplishment for a specialty brand made in 2013 by Karl-Friedrich Scheufele (co-CEO of Chopard). The furthest down the line vessel to join the armada not just shows the age and periods of the Moon however is fueled by the steady power of the in-house type giving a degree of galactic accuracy infrequently found in a watch, comparable to a one-day contrast in 577 years of operation.

If you imagined that the watch looks more like a logical instrument, you are right on the money. At the Ferdinand Berthoud remain in Baselworld a pondering circle was show in a glass bureau to show how the plan components of the dial were propelled by this noteworthy instrument. Made in 1772 by Étienne Lenoir adhering to directions by Jean-Charles de Borda, the instrument was utilized to figure longitude around evening time by measuring the situation of the Moon.

Although the dial remains moderately cleaned up, there is a ton going on in fact. The solitary things that will help you to remember the past emphasess of the Chronomètre FB1 are the particular octagonal case plan, the little hours and minutes counter positioned at 12 o’clock and the extended focal seconds hand with its tip twisted by hand to decrease parallax mistake. The tourbillon is not, at this point noticeable on the dial side and the lower half of the dial is offered over to the lunar complications. As you would anticipate from a watch of this family, the meticulousness is fanatical and running your finger over its different points and planes a genuine material treat.

The hull

Like the wide range of various Chronomètre FB 1 models, the case includes an expand octagonal profile with an enormous crown. The case is roused by the design of Ferdinand Berthoud’s marine chronometers, specifically, their gimbal suspension permitting on-board chronometers to keep an even position. Two windows on the caseband present light and a horizontal perspective on the development while the selector switch, situated somewhere in the range of 4 and 5 o’clock, is utilized to set the age of the Moon (L) or the Time (H). The complex apparatus beneath deck implies that the watch doesn’t quit running during the change of the Moon complications and the other way around with regards to setting the time.

The FB 1L is a huge watch estimating 44mm in breadth 13.95mm in tallness. Notwithstanding, the amazingly short drag modules guarantee the watch sits cozily on the wrist. Two adaptations are accessible. The Far Side of the Moon reproduces the baffling, imperceptible side of the Moon and its case center is created from sandblasted white gold while the more uncovered components are produced using ceramised titanium to dodge scratches. The Far Side of the Moon has a significantly more contemporary, specialized feel to it with its hazier range and matte sandblasted gold surfaces. The cleaned white gold model with dark artistic hauls, known as the Near Side of the Moon, is more radiant however looks bigger. The two dials are ensured with a domed sapphire gem that gives an intriguing bending, which you can appreciate on the section ring.

Moon Gazing

As referenced, the dial gives up its lower half to the ages and periods of the Moon, two very unmistakable estimations. We are on the whole acquainted with the Moon stage work representing the diverse lunar cycles, otherwise called a synodic month – on the off chance that you need to dive further into Moon watches, read our specialized article here . A hemispherical Moon, outlined by a ring with a bolt, ascends from the dial somewhere in the range of 4 and 5 o’clock. The 3D laser-engraved Moon is a practical interpretation of our heavenly neighbor, complete with pitted holes – one of which is named after Borda, out of appreciation for his groundbreaking lunar-distance strategy. The Far Side of the Moon is a dependable amusement of the celebrated Apollo 11 image of the undetectable side of the Moon. The bolt focuses to a remove region of the dial where you can see whether the moon is waxing or melting away, on account of a moving cam. There is another bolt over the cut-out on the dial showing whether the Moon age pointer is ascending (to day 14) or getting back (to the new Moon).

Used to the more conventional portrayal of the moon stages in a circle, this is a novel and to some degree irregular approach to address the fluctuating of our satellite. Continuously a dazzling capacity to notice, the periods of the moon were not exact enough readings for a researcher in the 18th century for galactic use. The superstar is the age of the Moon pointer, an undeniably more precise marker, which tallies the quantity of days since the last Moon. By combining the age of the Moon with time estimated by an installed chronometer, mariners could counsel their nautical chronological registries and ascertain their longitude with incredible precision.

To the left of the hemispherical Moon is a raised cartouche formed like a quadrant with the numbers 1 – 14 and the periods of the Moon portrayed on the edge. Day 1 demonstrates the principal day slipped by since the new Moon, while the number 14 addresses the full Moon. A toothed sensor axle with a steel spring (it looks somewhat like a shaper that slides to and fro) at 9 o’clock transfers the data of the age of the Moon to the hand. The antenna shaft arm is motivated by Ferdinand Berthoud’s framework to show the condition of time, in which a sensor axle arm followed a condition of time cam. For this situation, the antenna shaft arm is utilized to demonstrate the age of the Moon. A moving cam on the outskirts of the development manages the synchronicity between the stages and the age of the Moon and you can get a brief look at its teeth in the cut-out window at 4 o’clock. The cam enacts the sensor axle, which thus triggers the bigger hand to show the age of the Moon. When the hand has arrived at the number 14 it takes a retrograde attach and gradually gets back to the start of the cycle.

In keeping with the thorough science rehearsed by the ones who propelled this watch, the technicians controlling the Moon complications are exact to such an extent that solitary a one-day contrast will be commented in 577 years of consistent activity. Compare this amazing degree of exactness to the normal exactness of most customary moon stage shows, which are precise over a time of 122 years.

Calibre FB-T. FC.L

For the first run through since its dispatch, the type FB-T.FC.L highlights a licensed complication to show the age of the Moon, albeit the base of the hand-wound development, altogether made in-house, is equivalent to in past Chronomètre FB models. The first suspended fusée and chain winding gadget, which rules the upper portion of the development, conveys a consistent power to the escapement guaranteeing a constant flow of force during its 53 hours of independence. There is a force save marker on a recessed plate and the words Chronomètre on the contrary side verifying the watch’s COSC-chronometer certification.

Just to give you a thought of the Lilliputian elements of a portion of the components of the development, the chain is produced using 474 steel joins, has a sum of 790 components and measures under 0.30mm in breadth. The development additionally includes an altered one-minute tourbillon with direct-drive seconds to compensate for the varieties in rate actuated by various positions the watch receives for the duration of the day. The zone apportioned to the tourbillon is incredibly huge considering a phenomenal perspective on the escapement and the uncommon hand wraps up. The development comprises no less than 1,240 components and three half extensions, fitted on stylised columns, are produced using dark rhodium-plated silver.


This is a watch for specialists with a logical bowed, a watch that transfers and respects Ferdinand Berthoud’s steady mission for improved accuracy in the field of marine chronometry. A long way from being a nostalgic piece of memorabilia, the watch is a remarkable mix of components acquired from notable logical instruments with a contemporary curve. For a few, it may come across as a rather chilly, computing instrument, for others, it is a festival of science and innovation in smaller than expected form.

Availability and Price

Both models are given a hand-sewed dark gator leather tie fitted with a 18k white gold or titanium twofold sharp edge collapsing fasten. A pin clasp is accessible on solicitation. Restricted to 10 models in every rendition, the white gold FB Chronomètre FB 1L.1 Near Side of the Moon retails for CHF 265,000 while the titanium FB Chronomètre FB 1L.4 Far Side of the Moon retails for CHF 250,000. More subtleties at .