Creating a high-end Swiss watch movement is a two-worlds exercise: industrial machines cut components to tolerances of around 0.005 millimetres, and then artisans spend far longer decorating those parts by hand than it took to make them. The clearest window into this process comes from the Swiss manufacture Armin Strom, which produces 97 percent of its movement components in-house and documents each stage of the work. Its account shows why a bespoke movement is defined less by the machines that shape it than by the hands that finish and assemble it.
Introduction: The Essence of a Bespoke Swiss Movement
A mechanical watch's internal mechanism, excluding the face and hands, is the movement, and since the quartz era Swiss-made mechanical watches have been marketed primarily as luxury goods, purchased for their craftsmanship and aesthetic value rather than pure utility. That market position explains the peculiar economics of a bespoke movement: the functional parts could be produced faster and more cheaply, yet the manufacture deliberately adds hours of hand work that most owners will never see. Armin Strom's own description of its process — design, component production, decoration, assembly and testing — captures the arc, but the substance lies in the details: CNC tolerances measured in thousandths of a millimetre, gentian wood gathered each August in the Swiss mountains, and a movement that is assembled twice on purpose.
High-Precision Component Production: The Foundation of Craftsmanship
Armin Strom reports producing 97 percent of its movement components in-house using high-precision CNC machines that reach tolerances of around 0.005 millimetres. That figure — roughly five microns — is the industrial foundation of the entire process, because every subsequent stage depends on parts that fit together with almost no clearance. Yet the manufacture is careful to note that machining alone does not finish the job: every part is then fine-tuned, measured and adjusted by hand. This is the essential structure of modern high-end watchmaking. Automation delivers repeatability and dimensional accuracy that no hand could match, while the watchmaker's judgment converts a batch of precisely cut metal into components that will actually run together as a coherent mechanism.
The Art of Hand-Finishing: Elevating Aesthetics and Quality
Decoration is where a bespoke movement earns its price. Armin Strom hand-finishes every single surface, including the ones no one usually sees, and the company states that decorating a part to its standards can take up to ten times longer than producing it — which is why more of its watchmakers work on decoration than on assembly. The signature technique is bevelling, or anglage: filing the edges of parts to sharp, clean angles and then polishing these sloping edges to a high shine. For the final stage of bevelling, the manufacture's Decoration Team hand-selects gentian wood in the Swiss mountains every August, a traditional material that allows artisans to achieve flawless, mirror-polished surfaces.
Watch writer Mark Bernardo explains that anglage was once a utilitarian element that now adds aesthetic appeal, much like blued screws, which most high-end watchmakers still produce through traditional thermal tempering rather than a chemical process. The honest qualification here matters: hand-finishing is primarily an aesthetic achievement and a demonstration of skill rather than a guaranteed functional improvement over machine finishing in every case. Its value lies in what it signals — the hours of trained labor embedded in a part — and in the visible quality that distinguishes a luxury movement from a commodity one.
