Pulse One, SandLimited / 100 pieces, individually numbered

Name: Chronoswiss Pulse One, Sand CH-6823T-BRSI
Brand: Chronoswiss
SKU: CH-6823T-BRSI

Ref. CH-6823T-BRSI

2025–present · 41mm · caliber Chronoswiss Cal. C.6001: in-house-designed automatic manufactured by La Joux-Perret, 28,800bph, 55h PR, 31j; skeletonized tungsten rotor with radiating Cotes de Geneve

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GPHG 2025EnteredHomme category

Entry to the Grand Prix d'Horlogerie de Genève is voluntary and made by the brand. An entry is a watch registered for that year's competition, not a jury verdict, and several large houses including Rolex, Patek Philippe and Omega do not take part at all.

Limited · 100 piecesOfficial press photos

What it was up against

Homme, GPHG 2025

The Homme category at GPHG 2025 held 25 entries. These are the other 24.

Filter the full GPHG field for Homme, 2025

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Movement tier: unclassified · caliber Chronoswiss Cal. C.6001: in-house-designed automatic manufactured by La Joux-Perret, 28,800bph, 55h PR, 31j; skeletonized tungsten rotor with radiating Cotes de Geneve · 55h power reserve (2.3 days) · see-through caseback

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

41 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

A 2025-launch, 100-piece-per-colorway reference from a small independent Swiss brand; counterfeiting risk is minimal at this scale. The real risk is misdescription: confusing the two Pulse One colorways, or a strap being offered where none should exist.

Known issues in the market

Chronoswiss shipped the Pulse One exclusively on its integrated titanium bracelet, with no strap option offered at launch; a listing showing this reference on a leather or rubber strap is describing a modified watch, not the factory configuration.
Only two dial colors exist at launch, Sand (salmon-hued, blue CVD-coated markers) and Blue (royal blue, rhodium-plated hardware); each is capped at 100 numbered pieces, and the number should appear on the retrograde-scale printing.
The case is Grade 5 titanium, not steel; a genuine example should feel noticeably lighter than a steel watch of the same 41mm/46.27mm/12.75mm dimensions.

Area	What to check	What is correct	Red flag
case	Grade 5 titanium case and bracelet finishing	Media-blasted mid-case with curved crown guards, thicker polished knurling top and bottom, and a brushed-top bezel; noticeably light for its size	Case weight consistent with steel rather than titanium, or a finishing mix that does not match official photos
dial	Retrograde seconds subdial at 6 o'clock	Seconds hand sweeps the printed arc smoothly and snaps back to zero at the 60-second mark without hesitation or drift	Seconds hand that sticks, drifts, or fails to reset cleanly to zero
caseback	Sapphire display back over the C.6001 movement	Titanium caseback with sapphire window secured by 10 screws, showing a skeletonized tungsten rotor with radiating Cotes de Geneve	Solid caseback, or a visible movement/rotor inconsistent with the described finish

Common legitimate replacements

No aftermarket strap exists for this reference; a genuine Pulse One ships on its integrated titanium bracelet only.

Expert resources: Fratello Watches' introduction covers the case dimensions, bracelet construction, and C.6001 movement in detail for side-by-side comparison; each piece is individually numbered out of 100 on the dial.