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Brellum — Swiss watchmaking, COSC-certified chronometers.

New — Duobox 39 TC Moonphase, Night Blue dial

NEW Duobox 39 TC Moonphase

New Duobox 39mm, Triple Calendar Moonphase Chronometer, limited to 46 units

CHF 3'890

Independent by Nature. Direct by Choice. Swiss watches. Direct from the maker. No middlemen.

Brellum, Jura, Switzerland

2016 — 2026

Ten years of Brellum

Discover ten years of watchmaking creativity, season by season, through our timepieces and the reviews they have received from the specialist watch press.

Explore the ten years

Certified chronometers, down to the detail

Every Brellum timepiece is powered by a COSC-certified chronometer movement and delivered with its individual certificate. All our movements are meticulously decorated with perlage, Geneva stripes and blued screws, and can be admired through the sapphire exhibition case back.

  • COSC CertificationEach movement undergoes fifteen days of testing in five positions and at three different temperatures at the independent Swiss Official Chronometer Testing Institute.
  • Box-Shaped Sapphire CrystalsDomed on both sides, with anti-reflective and UV-protective coatings.
  • Numbered Limited EditionsProduced in small batches, with each rotor individually numbered.
About COSC certification

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