Strap for Seastar 1000 Powermatic 80

The lug width of the Tissot Seastar T066.407.17.057.02 is 20 millimetres. This measurement represents the external distance between the two lower lugs on the case—the attachment points for spring bars that secure the strap to the case. It is a rigid manufacturing specification: oversized or undersized straps will not insert correctly into the available seats, compromising safety during diving or water-sports activities.

For the Seastar T066.407.17.057.02, three material families are recommended: shell cordovan (American horse leather with natural temporal patina, ideal for those seeking deliberate aesthetic ageing); vegetable-tanned calf leather (tannins that generate stratified patina, British or Tuscan alternative of excellent durability); FKM or neoprene rubber (chemical resistance to saltwater contaminants, superior tactile grip, impassive longevity without aesthetic narrative). The choice depends on your desired balance between conscious aesthetics and marine function.

Strap replacement requires extraction of the spring bars using a dedicated tool or thin flathead screwdriver. Position the watch horizontally, insert the blade between the lower lug and the spring bar, apply downward pressure until the spring retracts, remove the metal pin from its seat. Repeat for the opposite lug. Load the new 20mm strap ensuring the passants are aligned with available seats, reinsert the springs with firm pressure until the click-lock engages. Avoid lateral torque on the screw-down crown during the operation.

Any strap with a 20mm lug width is compatible with the Tissot Seastar T066.407.17.057.02, regardless of brand, material, or construction. Always verify the lug width declared by the manufacturer: 20mm is the only acceptable standard. On milanostraps.it, the 20mm strap collection offers options in shell cordovan, alligator, vegetable-tanned calf, NATO cotton, and FKM rubber—all characterised by passants proportionate to the Seastar's case geometry.

Leather strap durability depends on tanning method, thickness, and usage pattern. Shell cordovan at 1.8–2.0mm thickness guarantees 8–12 years of daily wear with regular maintenance (dry cloth cleaning, annual conditioning with vegetable cream). Vegetable-tanned calf (1.4–1.6mm) resists 6–10 years. FKM rubber, lacking biological ageing, exceeds 15 years without appreciable chemical degradation. Continuous exposure to chlorine, saltwater, or direct UV light reduces these intervals by 20–30%. Rotating between multiple straps extends the overall lifespan of each individual unit.