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Movement tier: unclassified · caliber Czapek Cal. SXH5: Vaucher/FP Journe-derived automatic, 28,800bph, 72h PR; used in Antarctique; micro-rotor, open-worked architecture; Geneva manufacture · 72h power reserve (3 days) · see-through caseback
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
40.5 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The Czapek Antarctique Passage de Drake Ice White is a 40.5mm integrated-bracelet watch using the SXH5 micro-rotor automatic developed in partnership with the FP Journe manufacture. Czapek is a modern revival producing in small numbers; outright fakes are essentially nonexistent at this price point.

Known issues in the market
  • Pre-owned examples are modern (post-2020) and condition risks are standard: dial scratches, bracelet wear, and undisclosed service history.
  • The micro-rotor distinguishes the SXH5 from any generic base movement; a standard rotor under the display caseback indicates a movement swap.
  • The integrated bracelet requires correct link sizing; mis-sized or incorrectly assembled bracelets are a common pre-owned condition issue.
AreaWhat to checkWhat is correctRed flag
dialIce White dial surface and indicesWhite dial with clean, even surface; no yellowing or patina (modern production); applied polished indices; "Czapek" and "Geneve" text in correct typeface; Czapek crown logo at 12Yellowed or uneven white surface; incorrect typeface; printed indices rather than applied; logo proportions inconsistent with documented examples
movementSXH5 micro-rotor and finishingMicro-rotor visible through display caseback; movement signed "Czapek & Cie Geneve"; skeletonized or decorated bridges consistent with SXH5 architecture; 72-hour power reserveStandard rotor instead of micro-rotor; unsigned movement; generic ETA/Sellita base without Czapek finishing
braceletIntegrated bracelet and claspIntegrated steel bracelet with seamless lug transition; polished center links, brushed outer links; butterfly clasp with Czapek logo; solid links throughoutGap at lug-bracelet junction; hollow links; clasp without Czapek markings; incorrect link finishing pattern
casebackDisplay caseback and serialSapphire display caseback; "Czapek & Cie Geneve" engraving with serial; SXH5 caliber notation; serial matches between caseback engraving and inner caseSolid caseback where display is expected; serial mismatch; incorrect caliber designation
crownScrew-down crown40.5mm case with 120m water resistance requires a screw-down crown; crown engages smoothly with defined stop when fully tightenedPush-pull crown on a watch rated at 120m water resistance; crown that does not lock down
Common legitimate replacements
  • Czapek services movements at their Geneva atelier; pre-owned examples rarely require service given the brand's modern production history.
  • Bracelet sizing via link removal is routine; confirm correct link specification.
Expert resources: Czapek customer service for serial verification; the brand is responsive to authentication inquiries. Purists Forum has dedicated Czapek threads with detailed movement and dial close-up references.

Authentication guide

Last reviewed June 2026

The Antarctique is Czapek's integrated-bracelet sport watch. Cal. SXH5 uses a platinum micro-rotor developed in partnership with the Vaucher movement supply chain. The seamless case-to-bracelet machining and the platinum micro-rotor visible through the caseback are the primary authentication anchors.

Known reproduction risks

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HIGH RISK

Standard integrated-bracelet watch with dial overlay and incorrect movement

  • Bracelet that attaches via spring bars rather than the machined integration
  • No micro-rotor visible through the caseback
  • Movement finishing inconsistent with Vaucher supply-chain quality

Czapek is a small independent with relatively low secondary market volume. The primary risk is misrepresentation of the caliber, not sophisticated counterfeiting.

Dial variants by era

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EraDescriptionIdentifiers
2020 to present (Ice White)White-on-white sunray dial with applied indices. The Ice White variant has a white lacquer surface with white gold or silver-tone applied indices that create tonal contrast visible only at certain light angles.
  • White sunray dial with directional grain that catches light at specific angles
  • Applied rectangular indices with physical depth above the dial surface
  • Date window at 3 on most Antarctique variants (check specific reference for confirmation)
  • "CZAPEK" at 12 and "GENEVE" at 6, printed in a specific sans-serif typeface
  • Small seconds sub-dial at 9 with a blued steel hand

Service part flags

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Integrated bracelet and case

Original: The Antarctique case and bracelet are machined from 316L stainless steel with no visible seam at the lug. Articulated links with alternating brushed horizontal and polished vertical faces. Butterfly deployment clasp engraved with "CZAPEK" on the outer face.

Replacement tells
  • Any visible seam or step at the case-to-bracelet transition
  • Bracelet links with polish in incorrect orientations -- horizontal faces should be brushed
  • Deployment clasp without "CZAPEK" engraving or without butterfly mechanism
  • Bracelet that attaches with spring bars rather than the machined integration design
Platinum micro-rotor

Original: Cal. SXH5 uses a platinum micro-rotor integrated at baseplate level, visible through the exhibition caseback as a small dense grey-white semicircle in the lower portion of the movement.

Replacement tells
  • Full-size rotor bridge through the caseback rather than a small micro-rotor
  • Micro-rotor in gold or steel color rather than platinum grey-white
  • No rotor visible at all -- Cal. SXH5 is automatic and the micro-rotor should be present
Movement (Cal. SXH5)

Original: Automatic, 28,800 bph (4Hz), 72-hour power reserve, 22 jewels. Developed from the Vaucher supply chain. Exhibition caseback shows semi-open movement with visible bridges and decoration.

Replacement tells
  • Full oscillating rotor instead of the micro-rotor architecture
  • Movement finishing with machine marks on bridges or plate
  • Power reserve below 65 hours at full wind
  • No "SXH5" or equivalent Czapek caliber designation visible on the movement

Case back markings

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2020 to present
  • "REF.35-S-ICE" reference designation (or variant reference for other dials)
  • "CAL. SXH5" movement designation
  • "CZAPEK" and "GENEVE" engravings
  • 120M water resistance
  • Serial number in Czapek format
  • Exhibition caseback showing micro-rotor movement

Movement tells

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  • Cal. SXH5 power reserve is 72 hours. Running below 60 hours indicates mainspring service.
  • Beat rate is 28,800 vph (4Hz). The seconds hand advances in smooth 1/8-second steps.
  • A watch worn for a full day of normal activity should gain significant power reserve from the micro-rotor. If the reserve does not increase with wrist motion, the winding mechanism needs attention.
Sources: Czapek official: Antarctique.

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