Voutilainen’s Calibre 28 is one of the few modern independent‑watchmaking movements to remain in production for more than fifteen years. The maison closed the order book for the calibre at the end of 2025, ending its fifteen‑year production run. The final timepiece built on the calibre is the 28MPR, a 37.5 mm piece limited to fifteen examples each in steel, titanium and platinum. It carries moonphase and power‑reserve indications inside a newly proportioned case measuring 12.6 mm thick.
Beneath the new indications lies the same mechanical foundation that has powered the Vingt‑8 family since 2011. The 30 mm movement contains 246 components, runs at 18,000 vibrations per hour and offers roughly 65 hours of reserve. German‑silver plates, visible 18k gold wheels, the two‑wheel direct‑impulse escapement and a 13.5 mm free‑sprung balance with Phillips and Grossmann curves define the movement’s mechanical character and tie it to the long development that preceded it.
It is a restrained, technically clear piece marking the close of Calibre 28.
From Restoration to Original Architecture
Kari Voutilainen trained in Finland before moving to Switzerland in the late 1980s. Nine years at Parmigiani restoring complicated historical watches were followed by a period teaching at WOSTEP and the opening of his own atelier in Môtiers in 2002. His earliest independent pieces relied on modified ébauches but already showed Voutilainen’s inclination to reorganise mechanical layouts rather than focus solely on finishing.
The restoration work shaped his approach: it reinforced a view of movements as mechanical structures whose function and coherence could be strengthened through careful intervention. That perspective carried into his own timepieces, where layout, balance and mechanical clarity consistently took precedence over decoration.
By the time he began developing original constructions, the atelier was already working in a small‑scale, rigorous manner centred on hand‑executed detail. Those principles remained present in the independent movements that followed.
Early Experiments: Organising Information
Before the development of original constructions, the atelier’s early work involved adding information to existing movements while keeping their underlying architecture intact. Masterpiece 6, introduced in 2004, used a decimal repeater striking ten‑minute intervals instead of quarters. It was a demonstration of how mechanical information could be made legible without altering the core of the movement.
The work then turned to time. Masterpiece 7 and 8 added a second time zone, expressed within the existing balance of the dial and movement rather than through an external module. Both pieces showed how a secondary indication could be incorporated while preserving proportion and clarity.
In parallel, the maison produced pieces involving separation and layering. A regulator‑style chronograph separated hours, minutes and seconds to clarify elapsed time, forming the basis of the Masterpiece Chronograph using calibre 25. Its successor, Chronograph II, added a large date and moonphase in a run of ten pieces, showing how additional indications could be layered without losing coherence. These watches were not simply a collection of complications; they demonstrated how information could be structured, separated and layered while keeping the movement coherent.
The Observatoire: Establishing a Direction
The Observatoire series emerged in 2007, showing how far an inherited mechanism could be refined through proportion, finishing and mechanical clarity alone. Built on unfinished Peseux 260 observatory movements and finished to a high standard, the watches earned Voutilainen his first GPHG Men’s Watch Prize. Around fifty examples were produced, varying in case metal, dial and finishing.
The Observatoire treated the movement not as a fixed object but as raw material — a structure whose coherence could be strengthened through intervention. More than a series of finished watches, it marked the point at which the atelier’s approach to proportion, finishing and mechanical clarity became fully articulated.
Calibre 28: The Move to Original Architecture
By the late 2000s, the atelier began work on an original construction whose identity could remain stable as its displays evolved. Calibre 28, developed from 2008 and first delivered in 2011, became that foundation. Two escape wheels deliver alternating impulses directly to the balance. A large free‑sprung balance, German‑silver plates and visible gold wheels established the mechanical vocabulary that would anchor the Vingt‑8 family.
The first production Vingt‑8 used a 39 mm case with a hand‑guilloché dial and small seconds. It set the proportions and mechanical language that would remain through more than a decade of variations. Later pieces would reorganise the display, add indications or invert the movement entirely.
Over the following years, Calibre 28 became less a fixed movement than a framework within which different arrangements could be realised. Its escapement, balance and fundamental construction remained remarkably consistent, while the architecture around them was repeatedly reconsidered. Each development showed a different way the construction could be used, expanded or reinterpreted.
Adding Function
The first additions to Calibre 28 involved the incorporation of further information directly into the movement while its core construction remained intact. Power reserve formed the initial development. Roughly seventy components were introduced, including a conical mechanism and a Maltese‑cross arrangement, yet the escapement and balance remained untouched. The result was the Vingt‑8R.
A second time zone followed. The GMT‑6 integrated the indication into the calibre’s architecture, expressing it through a 24‑hour disc with day‑night separation while retaining the movement’s underlying geometry.
Further arrangements appeared in the 28GMR, where power reserve was placed at twelve and a second time zone was arranged concentrically with the small seconds at six. Both indications were absorbed into the calibre rather than added as external modules, showing how multiple functions were incorporated without disturbing the movement’s foundation.
Reworking the Display
Developments around Calibre 28 soon extended to the presentation of information. The 28ISO reinterpreted the minutes through a sector‑style display in which the hand travelled 390 degrees, leaving the movement unchanged and altering only how time was expressed on the dial.
A more restrained arrangement appeared in the 28R12, where the power‑reserve indication was set into blue enamel, bringing an earlier functional addition into a quieter visual language while preserving the underlying architecture.
Changing the Orientation
Work around Calibre 28 soon extended to how information was organised within the movement. On the 217QRS, the date became retrograde, requiring the calibre to accommodate a reversed direction of return while leaving the escapement and balance untouched.
Further variations appeared as the orientation of the movement itself was reconsidered. The 28TI inverted the calibre, placing hours and minutes on the front and seconds and power reserve on the reverse. Central seconds introduced another arrangement, achieved through a bridge and additional gearing above the existing structure, rerouting the indication while preserving the underlying architecture.
Refining Proportion and Surface
Work around Calibre 28 also turned toward proportion, clarity and surface treatment. The 28SC introduced central seconds through an added layer of gearing above the existing architecture, rerouting the indication while leaving the movement’s core geometry untouched. The piece received the Men’s Watch Prize in 2020.
Further arrangements appeared in the 28QDR, where the hierarchy of hours, minutes and seconds was restructured and a retrograde date was added, driven by a spring‑loaded sector and cam return. The indications were reorganised while the underlying construction remained unchanged.
Proportion was reconsidered in the 28CG, which brought the movement into a newly proportioned 37 mm case with a concave bezel, preserving the balance of the original 39 mm format while keeping the calibre intact.
A quieter expression followed in the 28GML SOUYOU, where a second‑time‑zone display was paired with a dial executed in multi‑layer Japanese urushi lacquer by Tatsuo Kitamura. The movement remained unchanged, while extensive surface craft was brought into dialogue with its architecture, earning the Artistic Crafts Prize at the GPHG in 2025.
The Final Expression
Throughout the developments around Calibre 28, the same elements provided continuity: the two‑wheel direct‑impulse escapement, the large free‑sprung balance and the German‑silver construction. The 28MPR brought these long‑standing components into a more classical arrangement, combining moonphase and power‑reserve indications within a newly proportioned case. After almost two decades of variation, the calibre is presented in a restrained, traditional form, shown through the same mechanical coherence, small‑scale production and hand‑executed detail that had characterised Voutilainen’s Vingt‑8 series from the beginning.
