Description
H. Moser & Cie. has unveiled the Endeavour Minute Repeater Cylindrical Tourbillon Skeleton Cosmic Rain (ref. 1909-0501), a 20-piece titanium limited edition of the Schaffhausen manufacture's most complex wristwatch. It stacks three headline acts — a dial-side minute repeater, a one-minute flying tourbillon with a cylindrical hairspring, and full skeletonisation — and crowns them with a Métiers d'Art aventurine-and-mother-of-pearl sub-dial evoking a meteor shower. Priced at CHF 378,350, it is also Moser's official entry in the Mechanical Exception category of the GPHG 2026.
Where traditional repeaters hide their hammers and gongs behind the movement, Moser stages the entire percussion section between 9 and 11 o'clock on the dial side, so the owner watches the mirror-polished hammers strike the hours, quarters and minutes on demand. The Cosmic Rain edition takes an already theatrical watch and gives it a night sky to perform under.
Design
The 40mm titanium case, 14.4mm tall, carries a sliding bolt on the caseband to arm the repeater and a hollowed-out middle that acts as a soundbox — titanium's low density and high rigidity amplify the chimes rather than muffling them, unlike gold or platinum. Front and back sapphire crystals expose the fully skeletonised HMC 909, its bridges hand-finished with Moser's double stripes. The only solid surface is the domed sub-dial at 2 o'clock: fragments of blue aventurine glass in two tones are applied by hand and fired multiple times to recreate Moser's signature fumé gradient, then inlaid with thin curved strips of iridescent mother-of-pearl — the "rain" streaking through the "cosmos". Leaf-shaped hands float over it, undisturbed by indices, and the watch closes on a hand-stitched grey nubuck strap with a titanium pin buckle.
Specifications
- Reference: 1909-0501
- Case diameter: 40mm
- Case thickness: 14.4mm
- Case material: titanium, hollowed caseband soundbox, sliding repeater bolt
- Crystal: sapphire front and back
- Dial: fully skeletonised; domed blue aventurine sub-dial at 2 o'clock with mother-of-pearl inlays; leaf-shaped hands
- Movement: HMC 909, in-house, hand-wound, fully skeletonised, 33mm x 9.6mm, 415 components, 35 jewels
- Complications: minute repeater (dial-side hammers and curved gongs), one-minute flying tourbillon
- Escapement: cylindrical hairspring, hand-shaped by Precision Engineering AG
- Frequency: 21,600vph (3Hz)
- Power reserve: 90 hours
- Strap: grey nubuck leather with alligator pattern, titanium pin buckle
- Limited edition: 20 pieces
- Price: CHF 378,350 (approx. GBP 348,300)
What's Exciting
Skeletonising a minute repeater is not decoration — it is a structural gamble. To keep the openworked architecture from colliding with the flying tourbillon, Moser's engineers had to position the curved gongs on a single plane and file them by hand to pitch, a task considerably harder than tuning conventional round gongs. Add the cylindrical hairspring — an 18th-century marine-chronometer solution to isochronism that almost nobody industrialises today, made by sister company Precision Engineering AG — and the HMC 909 reads like a syllabus of the hardest problems in watchmaking, solved in 415 components. The aventurine Cosmic Rain dial then does something Moser rarely does: it layers materials and textures instead of relying on pure colour. As a GPHG Mechanical Exception contender, this is Moser arguing that haute horlogerie can be simultaneously rigorous and theatrical.
History
H. Moser & Cie., founded in 1828 and revived under the Meylan family's MELB Holding in 2012, built its modern reputation on minimalist fumé dials and a mischievous streak. The brand released its first minute repeater paired with a tourbillon in 2019 in the Endeavour Concept, already exposing both complications dial-side. Several iterations followed, and earlier in 2026 Moser presented the fully skeletonised Endeavour Minute Repeater Cylindrical Tourbillon on which the Cosmic Rain is based. This 20-piece edition adds the first multi-material Métiers d'Art dial treatment of the series, continuing Moser's habit of pushing its most serious watchmaking through its most artistic filter.
