Tissot
Tissot Seastar 1000 Strap Size — 21mm Lug Width
The Tissot Seastar 1000 has a 21mm lug width, so it takes a 21mm watch strap.
Lug width21mm
| Lug width | 21 mm |
|---|---|
| Case size | 43 mm |
| Lug-to-lug | 50 mm |
| Thickness | 12.7 mm |
| Spring bar Ø (typical) | 2.0 mm |
| End type | Straight |
Strap styles that fit
- NATO / Zulu21mm fits if the strap's thickness clears the case under the bars.
- PerlonWoven pass-through, 21mm.
- 2-piece leatherStraight ends fit flush.
- Rubber / siliconeDivers & sports fit well.
- Milanese / meshStraight-end 21mm mesh fits.
- Metal braceletNeeds 21mm end-links shaped for this case.
▲ 21mm on the 43mm Powermatic 80 (T120.407).
Fit & sizing notes for the Seastar 1000
- Width: buy 21mm straps. Tapered straps listed as 21/19mm or 21/17mm fit too; only the first number has to match. See strap sizes explained.
- Spring bars: 21mm long, about 2.0mm diameter (spring bar sizes).
- Odd size: 21mm straps are harder to find; a 20mm strap fits with a small gap, but never go wider. Odd lug width options.
- Wrist fit: at 50mm lug-to-lug it should sit within the top of wrists from about 16.7cm up (rule of thumb: lug-to-lug under ~30% of wrist size). That's longer than 88% of the watches in our index. See what size watch suits your wrist.
- Strap thickness: at 12.7mm thick it's a chunky case: thicker padded leather, rubber/FKM or a heavier NATO balance it visually; very thin straps can look undersized.
Sources & corrections
Correction, 24 October 2026: This page previously listed 22mm. The 43mm Seastar 1000 Powermatic 80 (T120.407) is 21mm.
Lug width checked against: WatchBase: Seastar 1000 T120.407. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
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Tissot Seastar 1000 — strap questions
What size strap does the Seastar 1000 take?
The Tissot Seastar 1000 has a 21mm lug width, so you need a 21mm watch strap.
Will any 21mm strap fit the Seastar 1000?
Most will. Width is the main thing to match, but also check that the strap's spring-bar holes suit the bars, and that the strap is thin enough to clear the case between the lugs. A metal bracelet needs 21mm end-links made for this model.
What spring bar size does the Seastar 1000 use?
21mm long and about 2.0mm in diameter (a typical figure; measure the original bar to be sure).
Is the Seastar 1000 good for strap swapping?
Yes. With standard 21mm spring-bar lugs, NATO, leather, rubber and mesh straps can all be fitted with a spring-bar tool.