IWC Aquatimer GST

    Every reference with a known width takes the same strap size. Your reference is engraved on the case back or between the lugs at 6 o'clock.

    20 mm

    From our database, not yet verified

    42 mm case · 1998 to 2002

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

    Collection3 references
    20 mm
    Illustration drawn to scale: 42 mm case, 20 mm lugs

    Lug widths across the line

    The IWC Aquatimer GST takes a 20 mm strap: all 3 references with a listed width in our database use 20 mm. Check the reference on your case back to be sure.

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    3 IWC Aquatimer GST references

    IWC Aquatimer GST 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.

    • IW3536‑001

      Aquatimer GST 2000

      20 mm

      Database

      42 mm1998Grey dialTitanium

      Attachment
      integrated
      Style
      diver
      Movement
      Automatic
      Caseback
      Screw titanium
      Production
      1998-2004
      Status
      Listed in our database, not yet verified. Sources disagree on the model name

    • Aquatimer GST Split‑Minute IW3723 (GST Aquatimer Split Minute Chronograph)

      20 mm

      Database

      42 mm2002Grey dialTitanium

      Attachment
      integrated
      Style
      diver
      Movement
      Automatic Split
      Caseback
      Screw titanium
      Production
      2002-2004
      Status
      Listed in our database, not yet verified

    • IW3536‑002

      Aquatimer GST Steel

      20 mm

      Database

      42 mm1998Black dialSteel

      Attachment
      integrated
      Style
      diver
      Movement
      Automatic
      Caseback
      Screw steel
      Production
      1998-2004
      Status
      Listed in our database, not yet verified

    FAQ

    What lug width does the IWC Aquatimer GST use?

    The IWC Aquatimer GST takes a 20 mm strap: all 3 references with a listed width in our database use 20 mm. Check the reference on your case back to be sure. These widths come from our database and are not yet verified.

    Where do these IWC Aquatimer GST lug widths come from?

    From our database, which lists 3 IWC Aquatimer GST 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.