Ball Trainmaster

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

    16 to 20 mm

    Listed by the maker for ref. NM2080D‑S1J‑BE, NM2080D‑S1J‑SL and 8 more

    31 to 40 mm cases

    Filter references by lug width
    Find your exact reference

    Official page: Ball

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

    Collection11 references
    20 mm
    Illustration drawn to scale: 40 mm case, 20 mm lugs

    11 Ball Trainmaster references

    Ball Trainmaster 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.

    • NL2080D‑SJ‑BK

      Trainmaster Trainmaser Eternity Ladies (31mm)

      16 mm

      Maker

      31 mm

    • NL2080D‑S2J‑IBE

      Trainmaster Trainmaser Eternity Ladies (31mm)

      16 mm

      Maker

      31 mm

    • NM2080D‑S1J‑BE

      Trainmaster Eternity

      20 mm

      Maker

      39.5 mmBlue dialStainless steel and Sapphire case back

      Attachment
      classic lugs
      Status
      Listed by the maker

    • NM2080D‑S1J‑SL

      Trainmaster Eternity

      20 mm

      Maker

      39.5 mmSilver dialStainless steel and Sapphire case back

      Attachment
      classic lugs
      Status
      Listed by the maker

    • NM9080D‑S1J‑SL

      Trainmaster Legend

      20 mm

      Maker

      40 mmSilver dial904L stainless steel

      Attachment
      classic lugs
      Status
      Listed by the maker

    • NM9080D‑L1J‑SL

      Trainmaster Legend

      20 mm

      Maker

      40 mmSilver dial904L stainless steel

      Attachment
      classic lugs
      Status
      Listed by the maker

    • NM3288D‑S4CJ‑WH

      Trainmaster MSF 55 (40mm)

      20 mm

      Maker

      40 mmWhite enamel dialStainless steel

      Attachment
      classic lugs
      Status
      Listed by the maker

    • NM1038D‑S10J‑WH

      Trainmaster MSF Humanity (38mm)

      19 mm

      Maker

      38 mmWhite Enamel dialTitanium

      Attachment
      classic lugs
      Status
      Listed by the maker

    • Trainmaster MSF Humanity (38mm) (White Dial)

      19 mm

      Database

      38 mmWhite dial

      Attachment
      classic lugs
      Status
      Listed in our database, not yet verified

    • NM3888D‑S5CJ‑WH

      Trainmaster Standard Time GMT (40mm)

      20 mm

      Maker

      40 mmWhite enamel dialStainless Steel

      Attachment
      classic lugs
      Status
      Listed by the maker

    • NM1038D‑L5J‑BK

      Trainmaster Titanium

      19 mm

      Maker

      38 mmBlack dialTitanium

      Attachment
      classic lugs
      Status
      Listed by the maker

    FAQ

    What lug width does the Ball Trainmaster use?

    Ball Trainmaster lug width: 16 to 20 mm depending on the reference. The most common is 20 mm (6 of the 11 references with a listed width in our database). Find your exact reference in the table below. The Ball Trainmaster ref. NL2080D-SJ-BK and NL2080D-S2J-IBE take 16 mm (listed by the maker). The Ball Trainmaster ref. NM1038D-S10J-WH and NM1038D-L5J-BK take 19 mm (listed by the maker). The Ball Trainmaster ref. NM2080D-S1J-BE, NM2080D-S1J-SL and 4 more take 20 mm (listed by the maker).

    Do all Ball Trainmaster references take the same strap?

    No. 3 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 Ball Trainmaster lug widths come from?

    From our database, which lists 11 Ball Trainmaster references, 11 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 Ball collections

    All Ball 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.