Rotary Seamatic

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

20 or 22 mm

Verification: Listed by the maker

40 to 43 mm cases

Filter references by lug width

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

Collection31 references
22 mm
Illustration drawn to scale: 42 mm case, 22 mm lugs

31 Rotary Seamatic references

Rotary Seamatic 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.

  • RGS10059/70

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmWhite dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGS10058/70

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmWhite dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGS10057/05

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmSunray blue dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10038/04

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmBlack dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10036/06

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmWhite dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10035/06

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmSilver dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10034/05

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmSunray blue dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10033/05

    Seamatic 100 Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmSunray blue dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10044/57

    Seamatic 100 GMT Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmBlue dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10042/05

    Seamatic 100 GMT Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmBlue dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10037/04

    Seamatic 100 GMT Automatic

    Lug width: 20 mm

    Source: Maker

    Case size: 40 mmBlack dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB05430/29

    Seamatic 300 Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmWhite dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB05430/17

    Seamatic 300 Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmRed dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB05430/04

    Seamatic 300 Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB05430/27

    Seamatic 300 Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmYellow dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB05430/78

    Seamatic 300 Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmGreen dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • GB05430/57

    Seamatic 300 Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlue dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • GS04378/95

    Seamatic 300 GMT Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10006/04

    Seamatic 300 GMT Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dial

    Attachment
    classic lugs
    Style
    diver
  • RGB10005/24

    Seamatic 300 GMT Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmOlive green dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10005/96

    Seamatic 300 GMT Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • GB04378/95

    Seamatic 300 GMT Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10005/04

    Seamatic 300 GMT Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlue dialCase material: 316L stainless steel

    Attachment
    classic lugs
    Style
    diver
  • GS04378/96

    Seamatic 300 GMT Automatic Watch -

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • GS04378/97

    Seamatic 300 GMT Automatic Watch -

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10108/04

    Seamatic 300 GMT Black Edition Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmBlack dial

    Attachment
    classic lugs
    Style
    diver
  • RGS10006/01

    Seamatic Eclipse Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 43 mmGrey dial

    Attachment
    classic lugs
    Style
    diver
  • RGS10008/74

    Seamatic Eclipse Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 43 mmGrey dial

    Attachment
    classic lugs
    Style
    diver
  • RGB10008/06

    Seamatic Eclipse Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 42 mmSilver dial

    Attachment
    classic lugs
    Style
    diver
  • RGB10007/05

    Seamatic Eclipse Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 43 mmBlue dialCase material: Stainless steel

    Attachment
    classic lugs
    Style
    diver
  • RGB10009/74

    Seamatic Eclipse Automatic

    Lug width: 22 mm

    Source: Maker

    Case size: 43 mmGrey dialCase material: Rose gold

    Attachment
    classic lugs
    Style
    diver

FAQ

What lug width does the Rotary Seamatic use?

Rotary Seamatic lug width: 20 or 22 mm depending on the reference. The most common is 22 mm (20 of the 31 references with a listed width in our database). Find your exact reference in the table below. The Rotary Seamatic ref. RGS10059/70, RGS10058/70 and 9 more take 20 mm (listed by the maker). The Rotary Seamatic ref. RGB05430/29, RGB05430/17 and 18 more take 22 mm (listed by the maker).

Do all Rotary Seamatic 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 Rotary Seamatic lug widths come from?

From our database, which lists 31 Rotary Seamatic references, 31 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 Rotary 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.