The History of Watchmaking Anglage

Sound execution, sharp edges, and rising standards

When Huygens publishes the balance spring in 1675, he obviously does not found anglage as an autonomous discipline.¹² But he changes the technical horizon. As soon as portable precision becomes a more ambitious concern, the quality of execution ceases to be a secondary detail.

At this stage, speaking of codified anglage would be anachronistic. It is, however, reasonable to connect this rise in precision with greater attention to the cleanliness of components, the treatment of edges, and the removal of defects left by manufacturing. Patek Philippe’s contemporary wording is useful here because it explains this old issue in present-day terms: good finishing removes tiny burrs and machining marks, protects contact surfaces, and safeguards the part.¹⁸

Enlarge Visual marker — an early quest for precision

A historical illustration related to precision instruments. Useful for situating the context, without making it say more than it proves.

From portable precision to marine chronometry

Between Huygens and Berthoud, the guiding thread is not yet that of the “beautiful bevel” in the modern sense. It is, first of all, that of more demanding precision. With Berthoud, this demand becomes especially clear. The very title of the Traité des horloges marines published in 1773 links theory, construction, the workmanship of these machines, and the way they are tested.³

It would be excessive to turn Berthoud into a prophet of decorative anglage. His treatise does not speak the promotional language of today, and that is just as well. But it does show a watchmaking world in which chronometric performance cannot be separated from the way parts are designed, executed, and verified.³

In the same period, Geneva becomes a true Fabrique. Ordinances and the structuring of the trade shape the framework of a culture in which manufacturing quality is a matter of collective discipline.⁵

Enlarge Ferdinand Berthoud — precision, construction, control

A plate that helps convey the level of demand of the period: finishing is not yet described as it is today, but rigorous execution is already central.

Breguet, or elegance by construction

Around 1797, Breguet brings something else: elegance by construction. The subscription watch stands out through its large diameter, its enamel dial with a single hand, and a movement of great simplicity designed for more rational dissemination.⁴

This watch should not be overinterpreted. Official documents do not say that it alone inaugurates a doctrine of anglage. Yet its architectural simplicity has a decisive consequence: when construction is stripped back, execution is exposed more severely. The lines speak more clearly, and the slightest approximation becomes visible sooner.

Geneva, Glashütte, Besançon: when quality becomes transmissible and verifiable

Geneva: from trade culture to enforceable rule

In the 19th century, anglage changes status. In Geneva, the idea of sound workmanship gradually leaves the realm of the implicit and enters the realm of formal rule. The 1886 law on optional inspection of watches explicitly responds to the need to certify high watchmaking quality, sound workmanship, regular and durable running, as well as origin.⁶

Official criteria go so far as to specify concrete details: polished angles, drawn flanks, recesses finished so as to remove manufacturing marks, and polished chamfers around holes and sinks.⁷⁸

Glashütte: constructive rigour and a culture of stability

In Glashütte, the story runs in parallel rather than as a copy. Ferdinand Adolph Lange, trained in Dresden and later in Paris with Joseph Thaddeus Winnerl, founds his manufacture in 1845.⁹ In 1864, he introduces the three-quarter plate, still presented today as an element of stability and reduced tolerances.¹⁰

Besançon: training, control, and a chronometric environment

Besançon offers a third case, more institutional in nature. The municipal watchmaking school opens in 1862 and teaches watchmaking until 1988.¹¹ The astronomical, meteorological, and chronometric observatory is created by presidential decree in 1878 at the request of the city and the watchmakers of the Doubs, who were keen to improve local production.¹²

Series production simplifies, the highest level narrows

The industrial 20th century does not eliminate anglage; it shifts its status. When serial production becomes widespread, the time available per component shrinks. The most time-consuming finishes become rarer in ordinary production, while they concentrate in segments that still wish to make visible execution an argument for quality.

Within this new landscape, prestigious houses keep standards high. The Geneva Seal remains a living benchmark of demanding workmanship.⁶⁸ Industrialisation therefore does not make anglage disappear: it makes it more selective, more concentrated, and often even more revealing in ambitious pieces.

Seen from the workshop, this is an important turning point: the more general manufacturing is rationalised, the more finishing held by a trained hand becomes a clear proof. It is no longer simply a carefully treated detail. It is where one sees that execution has not been surrendered to convenience.

Mechanical pre-anglage, micromotor, hybridisation

This period is very often told far too quickly. Public sources describe contemporary practices fairly well, but more rarely document, year by year, the exact shift from fully manual work to mechanical pre-anglage. One must therefore distinguish clearly between what is attested and what belongs to reasonable reconstruction.

What is attested today: a large part of anglage can be mechanically prepared, while manual anglage remains a highly skilled craft. Components may be produced by CNC or on the lathe, then reworked and finished by hand to erase the traces of mechanical production.¹⁵¹⁶

The CPIH training plan shows in black and white the coexistence, within high-end anglage training, of the file, the polishing motor, the micromotor, and work on pre-bevelled parts.¹⁷ The machine thus prepares a geometry. The hand validates, reworks, refines, corrects, and polishes.

Enlarge The persistence of a very high manual standard

Even in a more mechanised world, some pieces remind us that a bevel held to the very highest level remains a matter of judgement, control, and visual experience.

Living heritage, contemporary references, coexistence of hand and machine

The 21st century has not turned anglage into a museum relic. It has made it more self-aware. In 2020, UNESCO inscribes the know-how of mechanical watchmaking and mechanical art watchmaking of the Franco-Swiss Jura on the Representative List of the Intangible Cultural Heritage of Humanity. The text insists on their position at the crossroads of science, art, and technology, as well as on the articulation between hand, machine, companies, and transmission.¹⁴

At the same time, the benchmarks become more precise. The Geneva Seal regulations still define anglage as a polished chamfer that removes the sharp edges between the surface and the flanks, maintain detailed criteria for components, and connect this standard to certification of the watch head that also covers water resistance, rate accuracy, functions, and power reserve.⁸

High-end houses express the same logic in their own words. Patek Philippe states that hand finishing is not merely aesthetic: it improves performance and durability by removing burrs and machining marks, easing edges, and protecting components against oxidation.¹⁸ A. Lange & Söhne, for its part, defends an approach in which every component, visible or not, must meet rigorous standards, with chamfers and inward angles that remain entirely manual.²¹

Because it makes judgement visible

Anglage fascinates because it is immediately perceptible and very difficult to fake for long. A width that wavers, a junction that collapses, a faceted surface left halfway finished, a hollow poorly held: the eye always ends up seeing it. Contemporary definitions of anglage as a regular, reflective surface, free of manufacturing traces and achieved through very fine control of the gesture, all converge in this direction.¹⁵¹⁸

It also fascinates because it lies at the point of contact between several truths. A geometric truth — holding an angle and a width. A visual truth — organising the reflection. A workshop truth — knowing where the machine is enough and where it is no longer enough. Training documents say it implicitly: pre-anglage, polishing the bevel, satin-finishing the flanks, and working with file, polishing motor, and micromotor all belong today to one and the same grammar of execution.¹⁷

Finally, it fascinates because it materialises something that has become rare: visible human judgement. A fine bevel is not only time spent. It is a precise arbitration between material, reflection, regularity, and restraint. It is also what makes a trained eye, at the bench, perceive very quickly what holds — and what is still floating.