Strap for Seastar 1000 Chronograph Quartz 45.5 Stainless Steel / Blue / Bracelet

The lug width (ansa in Italian) of the Tissot Seastar T120.417.11.041.00 is precisely 22mm. This measurement represents the distance between the two attachment pins on the case and is the critical parameter for aftermarket strap compatibility. All 22mm strap lugs fit this model without mechanical adjustment.

Strap choice depends on intended use. For recreational diving and marine resistance, FKM rubber or NATO cordura straps are superior: they resist saltwater and freshwater degradation, dry rapidly, and are hygienically controllable. For mixed use (daily wear with occasional diving), vegetable-tanned alligator offers luxury and durability, provided proper drying cycles are followed. On a 45.50mm case, straps of 4.5-5mm thickness maintain balanced proportions.

Strap replacement requires a dedicated spring bar tool. After carefully removing the current strap (to avoid case scratches), insert the new one by aligning the two lateral pins of the case. The procedure takes less than 2 minutes if executed with precision. Milano Straps provides straps ready for installation or installation consultancy at Casati Milano (by appointment) for those without specialist tools.

Yes, any strap with a 22mm lug width is compatible with the Tissot Seastar T120.417.11.041.00. Milano Straps offers a curated selection of straps in alligator, shell cordovan, vegetable-tanned leather, NATO, and technical rubber, all tested on similar-profile watches. The aftermarket allows personalisation of the instrument according to aesthetic and functional preferences without constructive compromise.

The lifespan of a natural leather strap depends on exposure to water and humidity. If worn daily in intense marine environments, natural leather visibly degrades within 18–24 months. If used for occasional diving and properly dried after each saltwater contact, a vegetable-tanned alligator strap maintains structural and aesthetic integrity beyond 3–4 years. For prolonged exclusive marine use, FKM rubber or NATO cordura extend service life to 5+ years without visible degradation.