SSC911P1
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: DatabaseCase size: 41.4 mmSilver dialCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed in our database, not yet verified
Seiko Prospex Speedtimer
The strap size depends on the reference. Yours is engraved on the case back or between the lugs at 6 o'clock.
20 or 21 mm
Verification: Listed by the maker for ref. SSC911, SSC913 and 4 more
39 to 42 mm cases · 2026
Filter references by lug width
Find your exact reference
Official page: Seiko
Report an errorIndicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.
Collection19 references
19 Seiko Prospex Speedtimer references
Lug width
Case size
Seiko Prospex Speedtimer 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.
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SSC913P1
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: DatabaseCase size: 41.4 mmBlue dialCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed in our database, not yet verified
-
SSC939P1
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: DatabaseCase size: 41 mmGrey dialCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed in our database, not yet verified
-
SSC941P1
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: DatabaseCase size: 41 mmBlack dialCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed in our database, not yet verified
-
SSC947P1
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: DatabaseCase size: 41 mmOrange dialCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed in our database, not yet verified
-
SBDL095
Prospex Speedtimer
Lug width: 21 mm
Source: DatabaseCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
SBDL097
Prospex Speedtimer
Lug width: 21 mm
Source: DatabaseCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
SBDL099
Prospex Speedtimer
Lug width: 21 mm
Source: DatabaseCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
SFJ001P1
Prospex Speedtimer
Lug width: 20 mm
Source: DatabaseCase size: 42 mmBlack dialCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
SFJ003P1
Prospex Speedtimer
Lug width: 20 mm
Source: DatabaseCase size: 42 mmBlack dialCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
SSC915P1
Prospex Speedtimer
Lug width: 21 mm
Source: DatabaseCase size: 41.4 mmBlack dialCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
SSC911
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: MakerCase size: 41.4 mmGrey dialCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed by the maker
-
SSC913
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: MakerCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed by the maker
-
SSC935
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: MakerCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed by the maker
-
SSC939
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: MakerCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed by the maker
-
SSC941
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: MakerCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed by the maker
-
SSC947
Prospex Speedtimer Prospex
Lug width: 21 mm
Source: MakerCase size: 41.4 mmCase material: Stainless steel
- Attachment
- classic lugs
- Style
- diver
- Status
- Listed by the maker
-
SSC955
Prospex Speedtimer (Purple/Bordeaux Dial)
Lug width: 20 mm
Source: DatabaseCase size: 39 mmPurple/Bordeaux dial
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
-
HBJ008P1
Prospex Speedtimer Solar Chronograph European Limited Edition
Lug width: 20 mm
Source: DatabaseCase size: 39 mmYear: 2026Deep blue dialCase material: Stainless steel
- Attachment
- classic lugs
- Status
- Listed in our database, not yet verified
No reference matches.
FAQ
What lug width does the Seiko Prospex Speedtimer use?
Seiko Prospex Speedtimer lug width: 20 or 21 mm depending on the reference. The most common is 21 mm (15 of the 19 references with a listed width in our database). Find your exact reference in the table below. The Seiko Prospex Speedtimer ref. SSC911, SSC913 and 4 more take 21 mm (listed by the maker).
Do all Seiko Prospex Speedtimer 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 Seiko Prospex Speedtimer lug widths come from?
From our database, which lists 19 Seiko Prospex Speedtimer references, 19 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 Seiko collections
- Gunmetal17 to 22 mm
- Presage Cocktail Time Honeycomb20 mm
- Presage Sharp Edged Gmt20 mm
- Prospex Alpinist19 or 20 mm
- Prospex Antarctica Tuna Save The Ocean20 mm
- Prospex Land19 to 21 mm
- Prospex Marinemaster20 mm
- Prospex Save The Ocean22 mm
- Prospex Solar21 or 22 mm
- Samurai20 or 22 mm
- Seiko6 to 24 mm
- Velatura22 mm
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
- Take the strap off, or look at the back of it: many straps print their width.
- Measure the inside gap between the lugs with a caliper or a millimetre ruler.
- 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.