Tissot · Seastar

Strap for Seastar 1000 Quartz 40 Stainless Steel - Yellow Gold / Black

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
ReferenceT120.410.22.051.00
FamilySeastar
MovementETA caliber F06.412 Hours, Minutes, Seconds | Date
CaseStainless 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 T120.410.22.051.00

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Seastar T120.410.22.051.00, seen from the bench

The Tissot Seastar T120.410.22.051.00 is a 40mm stainless steel sports watch powered by the ETA F06.412 automatic calibre, featuring 25 jewels and 28,800 vph oscillation frequency. Water-resistant to 300 metres with a rotating bezel and opaque black dial, the watch combines robust Swiss construction with practical proportions. The 20mm lug width ensures compatibility with standard aftermarket straps and reflects the classical proportional ratio established by Swiss manufacturers in the 1960s.

Frequently asked questions

What is the lug width of the Tissot Seastar T120.410.22.051.00?

The lug width of the Tissot Seastar T120.410.22.051.00 is 20mm. This measurement, taken between the spring bar attachment points, determines direct compatibility with straps specifically manufactured for this width. Always verify that the aftermarket strap measures exactly 20mm internally between the lugs to ensure stability and safety during wear.

What strap is best suited for the Tissot Seastar T120.410.22.051.00?

For the Seastar T120.410.22.051.00, genuine alligator leather represents the most aesthetically coherent choice: both materials age simultaneously, developing natural patina. Vegetable-tanned calf leather offers chromatic versatility and adaptable texture, whilst rubber constitutes the most technically rational solution for genuine nautical use. NATO straps in cotton-nylon ensure rapid changeover and daily practicality.

How do you change the strap on the Tissot Seastar T120.410.22.051.00?

Strap replacement on the T120.410.22.051.00 involves removing the spring bars using a dedicated tool called a spring bar removal pen. You must gently extract the old strap by pressing the spring bars from opposite sides, then insert the new element ensuring the bars lock correctly into the case seatings. This operation requires precision to avoid case damage: if lacking experience, consult a specialised watchmaker or an atelier such as Casati Milano.

Can aftermarket straps compatible with the Tissot Seastar T120.410.22.051.00 be used?

Yes, the Tissot Seastar T120.410.22.051.00 accepts quality aftermarket straps manufactured for the 20mm lug width. MilanoStraps offers an extensive selection of leather, NATO and rubber straps compatible with this specific case, all subject to quality control. It is essential to verify that the strap features properly dimensioned spring bars to guarantee perfect fit within the case seatings.

What is the average lifespan of a leather strap for the Tissot Seastar T120.410.22.051.00?

The lifespan of a leather strap for the T120.410.22.051.00 varies according to frequency of wear, leather type and environmental conditions. A quality alligator strap, worn daily, maintains structural integrity for 3–5 years. Vegetable-tanned calf leather tends to wear faster (2–3 years) but develops fascinating patina. Rubber, if properly maintained, easily exceeds 5 years. Prolonged exposure to humidity, heat and perspiration accelerates ageing: alternating straps extends the overall lifespan of each.

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