Technical Archive

Tissot
Seastar T120.852.11.051.00— lug 20mm

Tissot Seastar T120.852.11.051.00: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Seastar 1000 Quartz GMT 40 Stainless Steel / Black / Bracelet

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Tissot T120.852.11.051.00
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

T120.852.11.051.00

Movement

ETA caliber F06.412 Hours, Minutes, Seconds | Date

The Heritage

The Tissot Seastar reference T120.852.11.051.00 features the ETA F06.412 caliber with hour, minute, second and date indication. The watch has 20mm lugs for the strap. The movement provides the essential functions for everyday use with the convenience of quick date correction.

FAQ

What is the lug width of the Tissot Seastar T120.852.11.051.00?

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.

What is the best strap for the Tissot Seastar T120.852.11.051.00?

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.

How do you change the strap on the Tissot Seastar T120.852.11.051.00?

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.

Can I use a third-party aftermarket strap on the T120.852.11.051.00?

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. Milano Straps offers artisan-crafted 20mm straps, ready to ship.

How long does a leather strap last on a Tissot Seastar?

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.