Chronoswiss Sirius Big Date CH-3521.1R Full Set

Name: Chronoswiss Sirius Big Date CH-3521.1R Full Set
Brand: Chronoswiss
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The Watch: Chronoswiss was founded in 1983 by Gerd-Rüdiger Lang during the resurgence of mechanical watchmaking. At a time when quartz dominated, Chronoswiss stood out by championing traditional craftsmanship, specializing in hand-wound and automatic timepieces, becoming known for their distinctive onion crowns, fluted bezels, and finely detailed guilloché dials.

The Chronoswiss Sirius Big Date (Ref. CH3521.1R) showcases the brand’s dedication to classic watchmaking with a contemporary twist. Housed in a 40mm 18k rose gold case, the watch features Chronoswiss’ signature fluted bezel, onion-shaped crown, and lugs with screw-in bars.

The silver guilloché dial is adorned with Breguet-style blued hands and applied Roman numerals, exuding traditional elegance. The standout feature is the big date complication at 12 o’clock, paired with a small seconds subdial at 6 o’clock, adding symmetry to the design.

Inside beats the automatic Chronoswiss C.351 caliber, based on an ETA 2892-A2 with a Dubois Dépraz big date module. Visible through the sapphire caseback, the movement is finely finished and offers a 42-hour power reserve.

Condition: Very light use. Some very light marks visible, see photos.

Includes: Watch, box, and papers.