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Movement tier: unclassified · caliber Czapek Cal. SXH3: Vaucher-derived manual-wind, 21,600bph, 168h (7-day) PR; used in Quai des Bergues 7-Day; seven-day power reserve indicator at 6 · 168h power reserve (7 days)
Versatile size: fits most wrists (6–7.5 in / 15–19 cm)
38.5 mm case. The sweet spot for the broadest range of wrist sizes. Neither too dainty nor too bold.

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Authentication

Seven-day power reserve indicator and SXH3 calibre signing authenticate the Czapek Quai des Bergues

Known issues in the market
  • Czapek is a recently-revived brand with limited counterfeit history, but the name and prestige attract misrepresentation
  • Power reserve indicator must span 7 days; verify by running down and measuring
  • SXH3 calibre was developed by Agenhor specifically for Czapek; verify movement signing
AreaWhat to checkWhat is correctRed flag
dial7-day power reserve indicator and signingPower reserve scale graduated to 7 days; "Czapek" and "Quai des Bergues" or "Genève" signing; sub-dial layout per documented variantPower reserve scale less than 7 days; missing "Czapek" signing; layout inconsistent with documented QdB variants
movementSXH3 calibre by Agenhor"SXH3" engraved; manual-wind movement (no rotor); 7-day mainspring barrel; movement visible through exhibition caseback fully decorated; "Czapek Genève" or Agenhor signing per production batchRotor present on manual-wind variant; incorrect calibre designation; movement undecorated; power reserve does not run 7 days when tested
caseCushion-shaped QdB caseSquare cushion case with rounded corners; 38mm or documented variant diameter; crown at 3; exhibition casebackRound or rectangular case; crown position incorrect; case diameter inconsistent with documented QdB variants
Common legitimate replacements
  • Original strap is typically leather with Czapek deployment clasp; aftermarket straps are common on secondary market.
  • Manual-wind crown should wind smoothly through all positions; slippage indicates mainspring or winding mechanism wear.
Expert resources: Czapek Genève directly for serial verification; they maintain records of all production. Monochrome Watches and Fratello have documented the SXH3 calibre in detail.

Authentication guide

Last reviewed June 2026

The Quai des Bergues is Czapek's dress watch, drawing on the brand's 19th-century heritage. Cal. SXH3 is a manual-wind caliber with a 7-day power reserve indicated by a sector arc at 6. The case is available in precious metals only -- no steel variant for this model.

Known reproduction risks

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HIGH RISK

Different movement with incorrectly graduated power reserve arc

  • Power reserve arc not graduated in 7-day increments
  • Any automatic rotor visible through caseback
  • Steel case on a watch presented as standard QdB production

The QdB is low-production and on small allocation. The primary risk is a different Czapek model misrepresented as a QdB, rather than outright counterfeiting.

Dial variants by era

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EraDescriptionIdentifiers
2015 to presentWhite or silver dial with Roman numerals drawn from 19th-century watchmaking typography. Power reserve indicator at 6 graduated in days, small seconds sharing the 6 position.
  • Roman numerals in a specific thin-serif style from antique watchmaking references -- thicker and more architectural than modern sans-serif prints
  • Power reserve arc at 6 graduated 1 through 7 with a matching sector hand
  • Small seconds hand sharing the 6 o'clock space with the power reserve indicator
  • "CZAPEK" printed at 12, "GENEVE" at the lower sector
  • Dial in white enamel or silver sector on precious metal case only

Service part flags

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Power reserve arc

Original: The 7-day arc indicator is graduated 1 through 7. The hand advances from right (full) to left (empty) over 168 hours.

Replacement tells
  • Power reserve arc graduated for 40 or 72 hours -- indicates a different caliber was fitted
  • Indicator hand that jumps rather than advancing continuously
  • Scale that reads anything other than the 7-day graduation
Case material

Original: Available in rose gold, white gold, and platinum. No steel version was produced for the standard model. Polished top surfaces with brushed flanks.

Replacement tells
  • Any steel case presented as genuine QdB standard production
  • Case finishing that is entirely polished rather than the polished-on-brushed combination
Movement (Cal. SXH3)

Original: Manual-wind Vaucher-derived caliber, 21,600 bph (3Hz), 168-hour power reserve. Visible through exhibition caseback. Gold or rhodium-plated bridges depending on variant.

Replacement tells
  • Any automatic rotor visible through caseback -- Cal. SXH3 is strictly manual-wind
  • Power reserve that runs out before 140 hours at full wind
  • Movement finishing inconsistent with Vaucher supply-chain quality

Case back markings

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2015 to present
  • "REF.QDB-33" reference designation on caseback
  • "CAL. SXH3" movement designation
  • "CZAPEK" and "GENEVE" engravings
  • 30M water resistance
  • Case material designation (e.g. "18K OR ROUGE" for rose gold)
  • Exhibition caseback showing movement

Movement tells

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  • Cal. SXH3 power reserve is 168 hours (7 days). Wind fully and track: the arc should take exactly 7 days to advance from full to empty. Any run-time significantly below 6 days indicates mainspring service.
  • Beat rate is 21,600 vph (3Hz). Manual-wind winding stroke should feel smooth with no gritty resistance.
Sources: Czapek official: Quai des Bergues.

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