Strap for Seastar 1000 Quartz GMT 40 Stainless Steel / Black / Bracelet

The lug width of the Tissot Seastar T120.852.11.051.00 is exactly 20 millimetres. This measurement represents the distance between the two lateral case attachments where the strap is inserted. It is essential to order straps compatible with this specific size to ensure proper fit and functionality.

Strap choice depends on intended use. For formal and office contexts, we recommend black alligator or burgundy shell cordovan for natural elegance. For sports or marine use, NATO straps in heavy cotton or nylon offer practicality and durability. Vulcanised rubber is ideal if exposed to moisture, salt, and low temperatures. Vegetable-tanned leather represents the versatile compromise between vintage aesthetics and everyday practicality.

The strap is changed using a spring bar tool. Locate the two lateral case pins, insert the thin tip of the lever into the access hole, gently lift the pin to release it from the anchor hole, then withdraw the old strap. Repeat on the other side. To install the new strap, insert the first pin into the hole, then flex the strap to insert the second pin, aligning the lugs. Ensure both pins are completely locked in place.

Yes, any strap compatible with 20mm lug width is completely interchangeable on the T120.852.11.051.00. Quality aftermarket straps (leather, NATO, rubber) do not alter the watch's functionality or warranty. Choose reliable suppliers that guarantee precise tolerances to avoid misalignment. MilanoStraps offers artisan-crafted 20mm straps, ready to ship.

Leather strap durability depends on frequency of use and care. With daily use under normal conditions, a quality leather strap typically lasts 2-4 years before showing evident signs of ageing (cracks, tears). Vegetable-tanned leather ages more elegantly, developing patina, whilst alligator maintains better structural integrity over time. Prolonged exposure to moisture, saltwater, and perspiration shortens lifespan. Storing the strap away from direct light and cleaning it regularly extends service life significantly.