Understanding in-house watch movements
When choosing a new watch, its exterior is often what first catches our eye: a perfectly polished case, the depth of colour on the dial, or the way the crystal captures the light. For a true watchmaking enthusiast, though, the real story begins when we turn the watch over and look into its heart through the transparent caseback. The movement, or calibre, is what gives a watch its character and life. In the world of gears and springs, one term stands out as a symbol of prestige: in-house movement. But what does that actually mean for you as an owner, and does it always justify a higher price?
What does “in-house” really mean, and why has it become a mark of prestige?
Put simply, an in-house movement (also known as a manufacture movement) is one the brand has designed, developed and produced in its own workshops. Historically, this was not always the norm. Even the biggest names in Swiss watchmaking relied for decades on movement bases from specialist manufacturers, which they would then refine and decorate.
Today, however, having its own movement is a sign of watchmaking independence and technical capability. When a brand makes its own components, it has full control over every detail, from the look of the bridges to the technical innovations that make a watch more precise or durable. For the buyer, that means acquiring more than a design: it is a distinctive engineering signature you will not find in another watch outside that family.
Nomos Glashütte – a small manufacture with great authority
Few brands embody the spirit of independence as genuinely as Nomos Glashütte. Based in the heart of German watchmaking, Nomos has become synonymous with high-quality manufacture movements that are accessible to a wider circle of watch enthusiasts, not just those with an unlimited budget.
What sets Nomos apart is its remarkable attention to detail. While many brands buy at least their most sensitive components, Nomos spent years developing its own “Swing System” – the heart of the movement that determines its accuracy (the escapement). The blue hairspring in its DUW calibres represents years of research and investments of millions of euros in independence. Its movements are not only technically excellent; their slim profile and traditional “Glashütte” decorations, such as striped finishing and blued screws, also make them visually distinctive. When you buy a Nomos, you get a watch with a manufacture calibre whose level of in-house production in Glashütte reaches up to 95% – a real rarity in today’s world of mass production.
IWC and engineering: more than precision
While Nomos represents minimalist independence, IWC Schaffhausen represents pure engineering ambition. For IWC, an in-house movement is not simply a status symbol; it is a tool for pushing the boundaries of what a mechanical watch can withstand and achieve.
One of the best-known examples of IWC’s ingenuity is its legendary Pellaton winding system. Unlike standard systems, Pellaton uses specific levers that allow the movement to make highly efficient use of even the smallest movements of your wrist in both directions, winding the mainspring. The power reserve duration depends on the construction of the specific calibre; efficient winding is not the same as energy-storage capacity.
Longines and “exclusive” movements: the golden mean
In the world of watches, there is an interesting space between mass-produced and entirely unique manufacture movements, and Longines has mastered it with remarkable skill. As part of the Swatch Group, Longines has the advantage of working with ETA, the world’s largest movement manufacturer, to develop calibres reserved exclusively for the brand.
Take its L888 calibre, for example. Although it is based on a proven ETA architecture, it has been significantly modified to Longines’ specifications. The result is a movement offering up to 72 hours of power reserve, considerably more than the standard 38 or 42 hours typical in this range. For buyers, this is the “golden mean”: performance and exclusivity close to expensive manufacture solutions, with reliability and a price that remain competitive. It is a smart choice for someone who values fine mechanics but does not want to pay an astronomical price for the “in-house” label.
The advantages of standard “workhorse” movements (ETA and Sellita)
Although manufacture movements are the stars of the catalogue, standard movements made by ETA or Sellita are still at the heart of many high-end watches. Even brands such as TAG Heuer often use these proven “workhorses” in their legendary models, including Aquaracer or certain versions of Carrera, for several reasons that are good news for buyers.
First, these movements have been refined over decades. Their early teething problems were resolved long ago, making them exceptionally robust and reliable in everyday wear. Then there is maintenance. Movements based on the ETA 2824 or Sellita SW200 calibre are familiar to many watchmakers, but service options, parts availability and cost depend on the specific watch and service provider. Although these movements are straightforward to maintain, we recommend having any service during the warranty period carried out by an authorised service centre to preserve your warranty rights. If you plan to wear your watch every day and do not want regular servicing after five or ten years to become a logistical and financial undertaking, these movements are in fact the most practical choice.
How do you decide what is right for you?
Ultimately, the choice of movement comes down to what you expect from your watch and how you plan to use it.
When should you choose an in-house movement (for example, Nomos or IWC)?
If you are buying the watch as a collector’s piece, are fascinated by the engineering behind it, or want something unique that nobody else offers. A manufacture movement gives a watch a sense of exclusivity, but on its own it does not guarantee that the watch will retain or increase in value. It is also the right choice if a long power reserve or a particular movement aesthetic matters to you.
When should you choose a standard or exclusive movement (for example, Longines or TAG Heuer)?
If you are looking for a high-quality everyday watch that offers excellent value for money. The watch’s thickness and long-term maintenance costs depend on the specific model, construction and service provider. It is a rational choice for someone who wants a luxury brand and quality but does not prioritise proprietary gear development.
Conclusion
There is no wrong choice, only different philosophies. Whether your watch is powered by a movement developed over many years within the walls of the same manufacture, or one that became an industry standard because of its longevity, the most important thing is to understand what is on your wrist. A watch is a rare object in the modern world that still runs on pure mechanics, without batteries or software. Whether it is Nomos’s German precision or Longines’s Swiss efficiency, the heart of your watch tells a story of a tradition that refuses to grow old.