Introducing: The Ferdinand Berthoud Chronomètre FB 1.3

Introducing: The Ferdinand Berthoud Chronomètre FB 1.3

Chronomètre Ferdinand Berthoud FB 1.2, in rose gold.

The most current rendition of the Chronomètre Ferdinand Berthoud has recently been declared: FB 1.3, which adds a platinum model to the current white and rose gold models (FB 1.1 and FB 1.2 respectively). 

As we referenced this is aside from the case metal, indistinguishable from forms 1.1 and 1.2 anyway I believe it merits auditing a portion of the additional distinctive attributes of the case and plan. The octagonal shape, above all else, is a holler to the gimbal prepared boxes in which marine chronometers were customarily kept, and the huge focus seconds hand and controller clock-type situation of great importance and moment hands, is another gesture to the historical backdrop of exactness timekeeping. The presence of a middle seconds hand, coincidentally, is surprising for a tourbillon wristwatch. Regularly, a tourbillon with a one-minute carriage (the most common sort these days) has a running seconds sign through the basic catalyst of mounting the seconds hand on the upper turn of the tourbillon confine. In the FB 1.x models, the tourbillon confine has a driving wheel on it that thus, pushes the stuff on whose turn the recycled rides (it’s a one moment tourbillon, so it’s a straightforward 1:1 stuff ratio).

Chronomètre Ferdinand Berthoud FB 1.3 in platinum.

The type FB – T.FC.

The power hold marker is additionally a marine chronometer trademark however obviously, power save pointers are found in an extremely wide scope of other watches also. In marine chronometers they served a fundamental security work (you can’t discover your longitude adrift if your chronometer has been permitted to run down, and I can just envision the woeful outcomes to a boat’s watch officer if this were permitted to occur) and furthermore guaranteed that the chronometer’s force was being drawn from the ideal segment of the origin’s torque.

To further guarantee unvarying force to the escapement, numerous if not most boat’s boxed chronometers were likewise fitted with a chain-and-fusée. This gadget is an incredibly old one in horology; a portion of the most punctual realized spring driven tickers had them, and the gadget might just originate before spring driven timekeepers altogether (there is an image of a fusée cone as a feature of a crossbow twisting component in a military composition dating to 1405). The essential thought is equivalent to that behind the cone shaped stacked cog wheels in a 10-speed bike: the shifting distance across of the fusée cone offers a slowly expanding mechanical favorable position to the heart as it slows down, so the more fragile piece of the origin’s force hold has the best mechanical advantage.

Cone and fountainhead barrel for the Chronomètre Ferdinand Berthoud FB 1.3.

One of the difficult qualities of a chain-and-fusée is that when you wind the watch, you’re winding the chain back onto the fusée and looking at the situation objectively briefly, you’ll see that this implies that during winding, power stream to the development (which goes from the origin, to the fusée, to the stuff train) would be interfered. John Harrison tackled this issue in his H4 marine chronometer by designing what’s designated “looking after force” which in his form, comprises of a little optional spring in the fusée that is locked in during twisting, to keep up tension on the stuff train. Additionally, the Chronomètre Ferdinand Berthoud FB 1 arrangement has a keeping up force framework also (as do all cutting edge watches which utilize a chain and fusée, for clear reasons; the Ferdinand Berthoud framework is unique to the watch and FB has petitioned for a patent for the component, the differential planetary pinion wheels are obvious on the development side of the watch, on the base of the fusée cone).

Assembly of the fusée chain.

Assembly of the differential keeping up force framework in the fusée cone.

Another fascinating part of the FB arrangement is the general development of the development, and there several intriguing focuses. First is the overall development engineering – by and large present day developments utilize some minor departure from the bridge(s) and mainplate development spearheaded by Lépine during the 18th century. The Lépine type development was gone before by what’s designated “column and plate” developments, in which the going train was sandwiched in the middle of two plates, held together by “columns” supporting and interfacing the two plates at their peripheries. The column and plate framework was for the most part supplanted for watches by minor departure from the Lépine engineering, however it made due in checks and in marine chronometers. 

Marine chronometer by Berthoud, late 18th century, with column and plate development and “turf” bimetallic temperature compensation. 

In current wristwatches the column and plate framework is essentially never utilized; one outstanding exemption is the Glashütte watchmaker Moritz Grossmann, which utilizes that development for its developments including the type 100.1. As a rule the purpose behind evading it is that notwithstanding adding thickness, it makes development get together more troublesome, for the very explanation that 3/4 plate development is more troublesome; you need to get all the upper turns for all the pinion wheels in the going train to fall into the upper gems simultaneously (which is something I’ve encountered in dealing with vintage American pocket watches and the initial not many occasions you do it, it’s somewhat of a bad dream). Anyway on account of the Chronomètre Ferdinand Berthoud FB arrangement, there’s an extra detail that helps keep the watch a wearable size: the heart barrel and fusée are both connected distinctly to the lower (dial side) plate. This is an alleged “hanging barrel” development and by and large, you just think that its utilized in extra slight developments like the Vacheron type 1003. It’s not ever a component of genuine boxed boat’s chronometers (there would be no explanation behind it in that specific situation) yet in the FB 1.3 it implies that the development can be very dainty for a chain-and-fusée type, at simply 35.50mm x 7.96mm and the actual watch comes in at a very wrist-accommodating 44mm x 13mm – for such a watchmaking, entirely sensible indeed.

The Ferdinand Berthoud type FB-T.FC, with upper plate eliminated, showing support pillars.

A power save pointer was a standard marine chronometer include, and the Chronomètre Ferdinand Berthoud FB 1.3 has one, yet with a little turn – the mechanical execution is through a cone, which goes all over an arbor associated with the origin barrel as the watch is twisted, or as the barrel loosens up. A sensor arm “peruses” the stature of the cone and makes an interpretation of its situation into the changing situation of the force hold hand.

Power save cone and antenna arm.

As we’ve referenced in our prior inclusion what we have in the Chronomètre Ferdinand Berthoud FB 1.3 is definitely not an unadulterated marine chronometer for the wrist – this would be unrealistic and unfortunate. The marine chronometer and its development is more a state of takeoff than an objective, and the watch, with its tourbillon and hanging barrel-and-fusée development, peruses similarly however much a sort of chronicled outline of accuracy convenient mechanical timekeeping, including the freesprung, movable mass equilibrium, and materials decisions, for example, the utilization of German silver/maillechort for the plates (the columns are titanium, strangely enough).

Placement of the equilibrium and equilibrium spring in the tourbillon cage.

Circular cleaning of the fountainhead barrel.

Hand-cleaning of the fusée cone flanks.

Final assemblyof the movement.

Placement of the upper extension for the force hold cone.

Casing up the watch.

US valuing is $260,400 and the principal piece will be conveyed for the current week. Full specs can be found in our inside and out presentation ; see the FB 1 at 50 piece numbered and restricted version; similarly as with the other FB 1 arrangement models this is a COSC guaranteed chronometer. Accessible by application by means of solicitation for private gathering. Hit for more information.