Tissot · Seastar
Strap for Seastar 1000 Powermatic 80 43 PVD / Black / Rubber
Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Seastar T120.407.37.051.00 (aka: T1204073705100)
Selected for the 21 mm lug width · workshop selection
Cognac Mohawk Leather Strap€95
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Saffiano Taupe Strap€90
Black and Yellow Driver Leather Strap€130
Swift Topo Leather Strap€120
Frequently asked questions
What is the lug width of the Tissot Seastar T120.407.37.051.00?
The lug width of the Tissot Seastar T120.407.37.051.00 is 21 mm. This measurement is obtained by positioning a digital calliper between the inner pins of the lugs, with a construction tolerance of ±0.2 mm. It is essential to respect this dimension when selecting aftermarket straps to ensure compatibility and rotational stability without mechanical modifications.
Which strap material is recommended for the Tissot Seastar T120.407.37.051.00?
The Seastar T120.407.37.051.00 is compatible with multiple materials, each with specific characteristics: vegetable-tanned alligator develops natural patina and is ideal for formal occasions; NATO nylon offers practicality and water resistance; shell cordovan (equine leather) presents superior durability and develops burgundy patina over time; FKM rubber is perfect for intense aquatic environments and thermal variations. Choice depends on usage context and personal aesthetic preference.
How do you change the strap on a watch with 21mm lugs?
To change the strap, position the watch with the lug side facing upward. Use a spring bar tool or thin flat knife. Insert the tool into the slot of the suspender pin, push inward to release the internal spring tension, and slide the pin out of the lug. Repeat on the other side. Install the new strap by reversing the procedure, ensuring the pins are correctly seated in their slots. Verify rotational stability before wearing the watch.
Are aftermarket straps available that are compatible with the Tissot Seastar T120.407.37.051.00?
Yes, numerous manufacturers offer 21mm straps compatible with the Seastar T120.407.37.051.00. MilanoStraps provides a curated selection of straps in alligator, NATO, shell cordovan and rubber, all crafted with quality finishes and ready for shipment. Aftermarket straps allow aesthetic personalisation and colour variety without mechanical compatibility compromise.
What is the average lifespan of a leather strap on a sports watch like the Tissot Seastar?
A quality leather strap (vegetable-tanned alligator or shell cordovan) installed on a Seastar T120.407.37.051.00 has a typical lifespan of 4-6 years with moderate use (daily wear but not in prolonged aquatic environments). Longevity increases if exposed occasionally to moisture and decreases if subjected to pool chlorine or intense perspiration. Shell cordovan resists longer than standard calf leather. Periodic maintenance (cleaning with a damp cloth, drying, occasional conditioning with natural waxes) significantly extends useful life.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
