Kromm Watches
Mass-customized mechanical watches,
each unique as a fingerprint
Kromm Watches is a luxury mechanical watch concept developed by Groen Boothman for the Swiss watch industry. The project combines generative design, mass customization and high-precision manufacturing.
A watch is usually an object of repetition. Kromm starts from a different idea: what if individuality could be built into the production process itself?
Instead of personalizing a standard model through colour or engraving, Groen Boothman developed a generative methodology in which an algorithm creates individual variations. Every watch becomes unique, while remaining part of one coherent design language.
Not personalization as decoration, but generation through form itself.
Generated, not repeated
Each Kromm watch is generated from a master shape, influenced by an algorithm that creates subtle geometric variation. The result is a family of watches in which every piece is recognisably Kromm, yet every watch is unique as a fingerprint.
No two casings are exactly the same. No two crystals are identical. Each watch carries its own geometry.
That idea became the foundation of the project: a mechanical watch not designed as a repeated object, but as a controlled series of individual pieces.
Mass customization, made physical
Mass customization is often spoken about as a digital idea. In the Kromm project, it became a physical production challenge.
After a long search for the right partners, the process was developed with a network of specialized Dutch and Swiss companies from the high-tech manufacturing industry. Together, we turned the principle into a production method in which unique geometries can be translated into automated high-precision manufacturing.
In practical terms, this means that the machines do not simply repeat one fixed shape. They are programmed to automatically produce controlled variation in series, using CNC milling and digital production data as part of the design system.
Machines programming machines, but with the discipline of watchmaking.
The casing as a system
The casing, bezel and crystal were developed as one integrated shape system. Each element had to respond to the same generative logic, while still meeting the technical demands of a mechanical watch.
This is where the project becomes more than an aesthetic exercise. The algorithmic variation had to result in real parts, with real tolerances, real surfaces and real assembly constraints.
The outcome is a new archetype for a watch collection: one design logic that can unfold into multiple watch typologies, from chronograph to dress watch, from men’s to ladies’ models, each generated as an individual timepiece.
Self-locking strap mechanism
For Kromm, Groen Boothman also invented and designed a dedicated self-locking strap mechanism that allows straps and bracelets to be changed quickly and securely.
The principle was inspired by a familiar mechanical solution: the self-locking gate latch. Translated to the scale of a watch, that simple logic became a compact mechanism with a clear function and a distinct technical character.
It is a small detail, but an important one. It supports the idea that personalization should not stop at the shape of the case. The entire product had to be designed as a system.
What we did:
watch design, mass customisation and technical development
Groen Boothman invented the mass-customization principle behind Kromm and developed the design concept, the generative shape logic, the casing system, the strap mechanism and the translation from idea to production methodology.
The project brought together product design, engineering logic, digital manufacturing and supplier development. Technical support was provided by Bernhard Lederer and nSize, with further development made possible through cooperation with specialized Dutch and Swiss production partners.
The result is a watch project that uses mass customization not as a marketing layer, but as the core of the product.
A mechanical watch where individuality is not added afterwards, but designed into the process from the beginning.
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