IWC Pilot Perpetual Calendar

    The strap size depends on the reference. Yours is engraved on the case back or between the lugs at 6 o'clock.

    21 or 22 mm

    Listed by the maker

    42 to 46.2 mm cases

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    Official page: IWC

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    Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.

    Collection3 references
    21 mm
    Illustration drawn to scale: 42.9 mm case, 21 mm lugs

    3 IWC Pilot Perpetual Calendar references

    IWC Pilot Perpetual Calendar references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.

    • IW503605

      Pilot Perpetual Calendar Schaffhausen Big Pilot's Watch Perpetual Calendar 46.5mm

      22 mm

      Maker

      46.2 mmBlue dialStainless steel

      Attachment
      classic lugs
      Status
      Listed by the maker

    • IW329601

      Pilot Perpetual Calendar Schaffhausen Big Pilot's Watch Perpetual Calendar ProSet Le Petit

      21 mm

      Maker

      42 mmBlue dialStainless steel

      Attachment
      classic lugs
      Status
      Listed by the maker

    • IW339601

      Pilot Perpetual Calendar Schaffhausen Big Pilot's Watch Perpetual Calendar ProSet Le Petit

      21 mm

      Maker

      42.9 mmBlue dialCeramic

      Attachment
      classic lugs
      Status
      Listed by the maker

    FAQ

    What lug width does the IWC Pilot Perpetual Calendar use?

    IWC Pilot Perpetual Calendar lug width: 21 or 22 mm depending on the reference. The most common is 21 mm (2 of the 3 references with a listed width in our database). Find your exact reference in the table below. The IWC Pilot Perpetual Calendar ref. IW329601 and IW339601 take 21 mm (listed by the maker). The IWC Pilot Perpetual Calendar ref. IW503605 takes 22 mm (listed by the maker).

    Do all IWC Pilot Perpetual Calendar references take the same strap?

    No. 2 different lug widths appear across the line, often by case size or generation. Check the reference engraved on the case back or between the lugs.

    Where do these IWC Pilot Perpetual Calendar lug widths come from?

    From our database, which lists 3 IWC Pilot Perpetual Calendar references, 3 of them with a listed width. Each reference card says whether the maker lists the width, two independent sources agree on it, or it is not yet verified.

    Other IWC collections

    All IWC collections

    Help

    What is lug width?

    The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.

    Measure it in 30 seconds

    1. Take the strap off, or look at the back of it: many straps print their width.
    2. Measure the inside gap between the lugs with a caliper or a millimetre ruler.
    3. Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.

    Strap, quick release or system?

    Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.