Tissot · Seastar

Strap for Seastar 1000 Chronograph Quartz 45.5 Stainless Steel / Grey / Rubber

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter46 mm
ReferenceT120.417.17.081.01 (aka: T1204171708101)
FamilySeastar
MovementETA caliber G10.211 Hours, Minutes, Small Seconds | Date | Chronograph, Rattrapante
CaseAluminium, Stainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Seastar T120.417.17.081.01 (aka: T1204171708101)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Seastar T120.417.17.081.01 (aka: T1204171708101), seen from the bench

The Tissot Seastar reference T120.417.17.081.01 features the ETA G10.211 quartz movement with functions of hours, minutes, small seconds, date and split-second chronograph. The watch has 22mm lugs for the strap. The quartz movement offers the complication of the double chronograph for intermediate time measurement.

Frequently asked questions

What is the lug width of the Tissot Seastar T120.417.17.081.01?

The lug width of the Tissot Seastar T120.417.17.081.01 is 22mm. This measurement is taken perpendicular to the case, from the centre of one lug to the centre of the opposite lug. Any strap designed for 22mm lugs will fit this reference perfectly, ensuring precise alignment and optimal wrist stability during wear.

Which strap material should I choose for the Tissot Seastar T120.417.17.081.01?

Selection depends on intended use: for aquatic and sports environments, premium nylon NATO or FKM rubber offer rapid drying and chlorine resistance. For everyday elegant wear, alligator leather in navy or vegetable-tanned calf leather create harmonious visual dialogue with the black dial. Alligator delivers rigidity and chromatic presence; calf develops noble patina over time. All materials are available in 22mm at Milano Straps.

How do I change the strap on the Tissot Seastar T120.417.17.081.01?

Strap replacement requires a spring bar tool. Position the flat end of the tool beneath the case lug spring bar, apply upward pressure to compress the internal spring mechanism, and slide the old strap free. Repeat on the opposite lug. Insert the new 22mm strap, ensuring alignment with the lug holes, and verify that both bars click firmly into position. The procedure takes approximately three minutes and requires no watchmaking expertise.

Are aftermarket 22mm straps compatible with the Tissot Seastar T120.417.17.081.01?

Yes, any 22mm lug-width strap is mechanically compatible with the T120.417.17.081.01, provided total strap length is proportionate to the 45.50mm case diameter (typically 110–140mm). Confirm that the case spring bars have standard diameter (usually 1.5mm) and that strap lug holes are correctly dimensioned. Milano Straps' 22mm selections are engineered and tested for Seastar compatibility.

How long does a leather strap last on the Tissot Seastar T120.417.17.081.01?

Longevity varies with use and material: alligator or vegetable-tanned calf, worn daily in normal conditions, withstand 3–5 years before significant wear becomes evident (lug edge softening, elasticity loss). Frequent saltwater or chlorine exposure reduces lifespan to 18–24 months. NATO or FKM rubber endure 5–10 years even with intensive use. Regular maintenance—cleaning and drying after water exposure—substantially extends strap lifespan.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only