Technical Archive

Tissot
Seastar T120.852.22.051.00— lug 20mm

Tissot Seastar T120.852.22.051.00: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Seastar 1000 Quartz GMT 40 Stainless Steel - Yellow Gold / Black / Bracelet

Artisanal Note

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

Technical Specifications

Tissot T120.852.22.051.00
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

T120.852.22.051.00

Movement

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

The Heritage

The Seastar represents Tissot's sports line dedicated to diving watches. It is powered by the ETA F06.412 quartz caliber with hour, minute, second, and date indications. The model features 20mm lugs for the strap.

FAQ

What is the lug width of the Tissot Seastar T120.852.22.051.00?

The lug width of the Tissot Seastar T120.852.22.051.00 is exactly 20 millimetres. This measurement must be respected with precision: a 18mm or 22mm strap will not fit correctly. Verify with a digital calliper by measuring the internal space between the upper and lower lugs of the case.

Which strap do you recommend for the Tissot Seastar T120.852.22.051.00?

For the Seastar we recommend three primary options. An alligator strap with vegetable tanning for elegance and natural patina development over time. A vegetable-tanned calf leather for the balance between practicality and aesthetic refinement, with regular grain. A rubber FKM strap or Rip-Stop cotton NATO for intense aquatic activities, where wet grip is essential.

How do you change the strap on a Tissot Seastar?

The procedure requires a spring bar remover tool. Position the watch with the lug facing you, insert the flat tip of the remover under the internal spring of the lug, compress lightly until the spring disengages, then extract the bar. Repeat on the opposite side. Proceed in reverse to mount the new strap. If you lack experience, consult a watchmaker or our laboratory.

Does the T120.852.22.051.00 accept compatible aftermarket straps?

Yes, completely. The Seastar T120.852.22.051.00 does not use proprietary or rare lug sizes. Any quality strap with a 20mm lug width fits perfectly. Leather, rubber, NATO, shell cordovan: all categories are compatible. Explore our 20mm strap collection to discover over fifty variations.

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

A high-quality leather strap (vegetable-tanned alligator, vegetable-tanned calf) lasts 3-5 years with moderate daily use, depending on ambient humidity and frequency of water contact. Vegetable tanning develops natural patina that extends aesthetic credibility even as elasticity begins to diminish. A vulcanised rubber or NATO strap has greater longevity (7-10 years) as it is not subject to leather dehydration.