Kerbedanz's Maxima GR8 39mm pairs an incolor sapphire case with a new Ultraviolet dial. Limited to 50 pieces at CHF 330,000, revealed at Milano Watch Week 2026.
The Piece in Focus
- Introduced at Milano Watch Week 2026 (2–4 October, Palazzo Mezzanotte), this new dial colour marks the latest addition to the Maxima GR8 39mm Incolor Sapphire, an edition limited to 50 pieces worldwide.
- The Ultraviolet dial pairs with a fully transparent incolor monocrystalline sapphire case, keeping the central flying tourbillon visible from every angle.
- The automatic KRB-13 calibre houses 233 components, beats at 28,800 vph, and delivers 65 hours of power reserve via two parallel barrels.
- Recommended retail price is CHF 330,000 excluding taxes.
At Palazzo Mezzanotte on 2 October 2026, Kerbedanz chose Milano Watch Week 2026 as the setting to add a fourth dial colour to its Maxima GR8 39mm Incolor Sapphire collection. The Ultraviolet option joins Sepal Blue, Baby Blue, and Emerald Green within a global allocation of 50 pieces, according to the Maison’s press communication. “Milano has a unique relationship with design, colour and personal style,” said Vahé Vartzbed, CEO of Kerbedanz. “With the Ultraviolet dial, we wanted to bring an unexpected energy to the transparency of sapphire while keeping the central tourbillon as the absolute focal point of the watch.”
Sapphire and Colour in Dialogue
Machining a case from monocrystalline sapphire is among the most technically demanding operations in contemporary watchmaking. The material requires extremely precise machining, polishing, and finishing to achieve the complex geometry of the GR8 case while preserving optical purity throughout. On the 39 mm Maxima, a domed sapphire crystal further accentuates the depth of the composition, adding a three-dimensional quality that flat glass cannot replicate.
The Ultraviolet dial was chosen for its intensity and its capacity to interact with light passing through the case. The vivid colour appears almost suspended within the sapphire, constantly shifting in character as ambient light changes. Transparency, rather than concealing the movement, places the mechanical architecture on full display from every perspective.
The KRB-13 Calibre and Its Central Tourbillon
The automatic KRB-13 calibre drives a one-minute central flying tourbillon with hand-chamfered components. Hours and minutes are displayed peripherally, leaving the entire centre of the dial dedicated to the tourbillon cage and its continuous rotation. The openworked dial is exclusively designed, manufactured, and hand-decorated for Kerbedanz, reinforcing the architectural depth of the construction. Water resistance is rated to 30 metres, and a rubber strap with a titanium deployant buckle and an interchangeable system completes the specification.
Specifications
| Movement | Automatic, KRB-13 calibre; central flying tourbillon with variable inertia balance wheel; 233 components; 32 jewels; two barrels in parallel; 28,800 vph (4 Hz); 65-hour power reserve |
| Case size | 39 mm diameter |
| Case material | Incolor monocrystalline sapphire |
| Dial | Openworked, exclusively designed, manufactured and hand-decorated by Kerbedanz; Ultraviolet colour |
| Strap | Rubber strap with titanium deployant buckle and interchangeable system |
| Water resistance | 30 metres (3 bar / 100 ft) |
| Price | CHF 330,000 excluding taxes |
| Availability | On request from the maison or an authorised retailer in the Middle East |
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Frequently Asked Questions
How many pieces of the Kerbedanz Maxima GR8 39mm Incolor Sapphire are produced?
The Maxima GR8 39mm Incolor Sapphire is limited to 50 pieces worldwide, offered across a selection of dial colours including Sepal Blue, Baby Blue, Emerald Green, and the newly introduced Ultraviolet.
What movement powers the Kerbedanz Maxima GR8 39mm?
The watch houses the automatic KRB-13 calibre, comprising 233 components and 32 jewels, beating at 28,800 vibrations per hour with a 65-hour power reserve delivered by two barrels mounted in parallel.
What is the price of the Kerbedanz Maxima GR8 39mm Ultraviolet in the Middle East?
The recommended retail price is CHF 330,000 excluding taxes. Prospective buyers in the Middle East should contact Kerbedanz directly or an authorised retailer for regional pricing and availability.
Is the Maxima GR8 39mm suitable for daily wear given its sapphire case?
The 39 mm case diameter gives the piece a contemporary proportion on the wrist, and water resistance is rated to 30 metres. The rubber strap with a titanium deployant buckle and an interchangeable system adds practical flexibility for regular wear.
Explore more from KERBEDANZ: Kerbedanz Maxspor Gr8: A 41mm Monopusher Chronograph · Kerbedanz Maxima GR8: Ceramic Expression at 39mm.
