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Top-tier supplier movement · caliber IWC Cal. 35111: automatic, Pellaton winding, 42h PR, 21j; in-house finish; 4 Hz; Sellita SW300 base architecture · 42h power reserve
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

Confirm the Pellaton winding architecture through the caseback; the ceramic bearing pawl-and-ratchet design is the key mechanical identifier.

Known issues in the market
  • The Da Vinci revival case is round; the original 1960s-70s Da Vinci had a tonneau shape. Any rectangular case on a post-2017 Da Vinci is a misidentification.
  • Cal. 35111 Pellaton winding should be visible through the caseback; standard ratchet winding without ceramic bearings indicates a different or swapped movement.
AreaWhat to checkWhat is correctRed flag
casebackCal. 35111 Pellaton winding with ceramic bearingsPellaton pawl-and-ratchet winding with ceramic bearings visible through caseback; Cal. 35111 identity confirmedStandard ratchet winding without Pellaton architecture; any caliber other than 35111
caseDa Vinci revival round caseRound case with bezel design referencing the original Da Vinci; contemporary IWC proportions for the 40mm sizeRectangular or tonneau case on a post-2017 Da Vinci; wrong generation case for this reference
dialDa Vinci dial with Roman numeral chapter ringRoman numeral chapter ring consistent with Da Vinci specifications; clean dial with no damage to applied indicesArabic numerals on a reference specifying Roman numerals; any damaged applied indices
Common legitimate replacements
  • Original IWC Da Vinci strap; factory replacements are standard.
Expert resources: IWC Da Vinci Automatic 40 IW356601 product documentation. IWC Cal. 35111 Pellaton specifications.

Authentication guide

Last reviewed June 2026

The IW356601 Da Vinci Automatic was relaunched in 2017 in a more restrained 40mm case, moving away from the heavily styled prior generation. Cal. 35111 (ETA 2892-based) powers it. The distinctive design element is the curved case and the chapter ring with a distinct step between the bezel and dial.

Known reproduction risks

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LOW

The Da Vinci is a lower-value target than the Portugieser or Big Pilot.

  • The curved case is difficult to replicate with correct geometry; most replicas use a flat case approximation
  • Stepped bezel transition is a precision fit; replicas show a visible gap or inconsistent step

Dial variants by era

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EraDescriptionIdentifiers
2017 to presentSilver, white, or black dials with applied baton indexes and a curved case that follows the wrist arc. The bezel has a stepped inner edge that frames the dial.
  • Curved case with a convex front and concave back designed to follow the wrist arc
  • Stepped bezel creating a distinctive visual frame for the dial
  • "DA VINCI AUTOMATIC" text on the dial
  • Date at 3 o'clock
  • Applied baton indexes (no Arabic numerals on the standard variant)

Service part flags

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Case curvature

Original: The Da Vinci 2017 case uses a pronounced wrist curvature that is immediately apparent when the watch is turned case-down. The lug curvature is an integral part of the design.

Replacement tells
  • A flat-backed case in a stated Da Vinci 2017; the curvature is a fundamental design feature
  • Case back that does not follow the curved profile of the case flanks
Movement

Original: Cal. 35111 is a modified Sellita SW300-1 (lineage to the ETA 2892) with IWC modifications. The Portofino Automatic 40 now uses this same Cal. 35111; both superseded the older Cal. 35100 built on the ETA 2892.

Replacement tells
  • Service records noting the older Cal. 35100, or a bare Sellita SW300-1 / ETA, in a stated IW356601

Case back markings

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2017 to present
  • Exhibition caseback showing Cal. 35111
  • Engraved ring: IWC SCHAFFHAUSEN with reference IW356601 and serial

Movement tells

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  • Cal. 35111 runs at 28,800 bph with approximately 42 hours of power reserve. The IWC-marked rotor is visible through the exhibition caseback.
Sources: IWC Da Vinci product page; WatchUSeek -- Da Vinci IW356601 thread.

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