Tissot · Seastar

Strap for Seastar 1000 Powermatic 80 40 Stainless Steel - Rose Gold / Grey / Bracelet

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
ReferenceT120.807.22.051.01
FamilySeastar
MovementETA caliber C07.111 hours, minutes, seconds | date
Year2025
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 T120.807.22.051.01

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Seastar T120.807.22.051.01, seen from the bench

The Tissot Seastar reference T120.807.22.051.01 is equipped with the ETA caliber C07.111 movement with hour, minute, second and date indication. The watch features 20mm lugs for the strap. The model is part of the Seastar collection by the Swiss manufacturer Tissot.

Frequently asked questions

What is the lug width of the Tissot Seastar T120.807.22.051.01?

The Tissot Seastar T120.807.22.051.01 is equipped with 20mm lugs. This measurement is determined by the distance between the vertical pins of the case and represents the available space for the strap. It is essential to verify this dimension before ordering an aftermarket strap, as a non-conforming lug width would result in poor fit and instability during wear.

Which strap do you recommend for this Tissot model?

For the Seastar T120.807.22.051.01, we recommend alligator straps with vegetable tanning, shell cordovan, or Italian vegetable-tanned calf leather. These materials balance the watch's sportiness with refined craftsmanship. For aquatic contexts, a cotton-blend NATO or vulcanised rubber ensures performance and easy cleaning. The choice depends on primary use: diving? Alligator. Daily urban wear? Shell cordovan or calf leather.

How do I change the strap on this Tissot Seastar?

The Seastar T120.807.22.051.01 uses straight spring bars without spring mechanisms. You'll need a spring bar tool (lug removal lever) or a small flat lever. Position the tool on the lower groove of the pin, apply gentle upward pressure, and the pin will slide out of the lug hole. Repeat on the second pin. For installation, push the new strap onto the same pins until they click into place. If inexperienced, have a professional watchmaker perform the service to avoid case damage.

Is a 20mm aftermarket strap compatible with the T120.807.22.051.01?

Yes, any 20mm strap is physically compatible. However, quality and fit depend on artisanal construction. A generic strap may present lateral protrusions or an insufficiently calibrated passant. Casati Milano crafts custom straps that respect the exact geometry of your case, ensuring a perfect visual transition between metal and material.

How long does a leather strap last on this Tissot?

A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts 5–8 years with daily wear, provided it receives regular maintenance: quick drying after moisture exposure, annual conditioning with vegetable waxes, gentle cleaning. Shell cordovan is the most durable material and can exceed 10 years. Factors such as climate (humidity), cleaning frequency, and exposure to chemical agents (soap, perfumes) influence longevity.

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