Strap for Seastar 1000 Automatic Chronograph Ceramic

The lug width of the Tissot Seastar T066.427.17.057.02 is 23mm. This dimension is specific to this model and corresponds to the depth of the side lugs on the 48mm case. To verify strap compatibility, measure the internal distance of the lug spring using a digital calliper; the reading should be 23mm with a tolerance of ±0.3mm maximum.

For the Seastar, we recommend straps in premium alligator with vegetable tanning, French calf leather, or FKM rubber if frequent diving or salt-water environments are anticipated. Cognac alligator or warm brown calf balance the robustness of the ceramic case; rubber guarantees structural unalterability. Shell cordovan is not recommended for this model due to its permeability to humidity.

Two tools are required to replace the strap: a spring bar tool and a stable work surface. Position the watch on a soft cloth. Insert the tool into the lateral groove of the lug spring from the inside, applying gentle upward pressure to free the spring from its pin. Extract the lug and repeat on the opposite side. Flip the old strap, align the attachment holes, then reinsert the lug springs by applying pressure until you hear a click. Verify the lock by gently pulling the strap downward.

Yes, any strap with a certified 23mm lug width is compatible with the Tissot Seastar T066.427.17.057.02, provided that the manufacturing tolerance falls within ±0.3mm. Bespoke artisanal straps guarantee this precision. We recommend verifying compatibility in advance with the retailer, especially if you choose inelastic leather straps, which require a perfect fit to avoid friction on the lugs.

A vegetable-tanned leather strap of superior quality typically lasts 3–5 years under moderate daily-use conditions, with regular maintenance (wiping with a damp cloth, conditioning every 12–18 months with neutral hydrating cream). Salt-water exposure or prolonged contact with sea water accelerates wear. If the Seastar is destined for frequent diving, we recommend choosing an FKM rubber strap, which maintains intact elastic parameters even after 20+ years of continuous underwater use.