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    Frederique Constant Classics Runabout Automatic

    Widths differ across this line. Enter or pick your exact reference to get its width.

    18 or 21 mm

    Listed by the maker for ref. FC‑303RMLN5B6 and FC‑303RMLN3B6

    Attachment: to verify

    36 to 42 mm cases

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    Official page: Frederique Constant

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

    Collection4 references
    21 mm
    Illustration drawn to scale: 42 mm case, 21 mm lugs

    4 Frederique Constant Classics Runabout Automatic references

    Frederique Constant Classics Runabout Automatic 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.

    • FC‑303RMLN3B6

      Classics Runabout Automatic Blue 36

      18 mm

      Maker To verify

      36 mmBlue dialStainless steel

      Style
      dress
      Movement
      Automatic
      Caseback
      Screw-down steel
      Production
      2018, present
      Status
      Listed by the maker

    • FC‑303RMLN5B6

      Classics Runabout Automatic Blue 42

      21 mm

      Maker To verify

      42 mmBlue dialStainless steel

      Style
      dress
      Movement
      Automatic
      Caseback
      Screw-down steel
      Production
      2018, present
      Status
      Listed by the maker

    • FC‑350RBR5B6

      Classics Runabout Automatic GMT Brown

      21 mm

      Not yet verified To verify

      42 mmBrown dialStainless steel

      Style
      dress
      Movement
      Automatic
      Caseback
      Screw-down steel
      Production
      2018, present
      Status
      Listed in our database, not yet verified

    • FC‑350RN5B6

      Classics Runabout Automatic GMT Navy Black Rubber

      21 mm

      Not yet verified To verify

      42 mmNavy dialStainless steel

      Style
      dress
      Movement
      Automatic
      Caseback
      Screw-down steel
      Production
      2018, present
      Status
      Listed in our database, not yet verified

    FAQ

    What lug width does the Frederique Constant Classics Runabout Automatic use?

    Frederique Constant Classics Runabout Automatic lug width: 18 or 21 mm depending on the reference. The most common is 21 mm (3 of the 4 references with a listed width in our database). Find your exact reference in the table below. The Frederique Constant Classics Runabout Automatic ref. FC-303RMLN3B6 takes 18 mm (listed by the maker). The Frederique Constant Classics Runabout Automatic ref. FC-303RMLN5B6 takes 21 mm (listed by the maker).

    Do all Frederique Constant Classics Runabout Automatic 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 Frederique Constant Classics Runabout Automatic lug widths come from?

    From our database, which lists 4 Frederique Constant Classics Runabout Automatic references, 4 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 Frederique Constant collections

    All Frederique Constant 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.