Technical Archive

Tissot
PRX T137.407.11.041.02— lug 12mm

Tissot PRX T137.407.11.041.02: 12mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Artisanal Note

"This model requires a precise 12mm lug width to preserve the original sartorial balance."

Lug Width

12 mm

The essential strap measurement.

Browse 12mm straps →

Reference

T137.407.11.041.02

Movement

ETA caliber C07.111 Hours, Minutes, Seconds | Date

The Heritage

The Tissot PRX T137.407.11.041.02 is a modern reinterpretation of a 1970s design icon, featuring a 40mm stainless steel 316L case with integrated bracelet geometry. It houses an ETA caliber C07.111 movement running at 4Hz, a date window at 3 o'clock, and 100m water resistance. The 12mm lug width is proportionally essential to the case diameter and overall design balance. Alligator, vegetable-tanned, and aniline calf leather straps complement its angular aesthetic.

FAQ

What is the lug width of the Tissot PRX T137.407.11.041.02?

The lug width of the Tissot PRX T137.407.11.041.02 is 12mm. This is the free space between the two stainless steel lugs measured from the inner side. It is a precise standard that excludes universal straps and requires careful selection from quality strap manufacturers.

Which strap is best suited for the Tissot PRX T137.407.11.041.02?

The most coherent strap depends on usage: for daily elegance, a dark brown alligator or navy blue aniline calf; for versatility, a charcoal grey NATO; for those who appreciate ageing, a vegetable-tanned calf in cognac colour. The geometric 1970s case benefits from straps that do not compete with its architectural presence.

How do I change the strap on my Tissot PRX?

The change is straightforward: use a spring bar tool to gently push the lug spring inward from the opposite side. Once the metal pin is freed, the strap separates from the case. Reinsert the new strap, aligning the lug to the case, and ensure the pin clicks firmly into position. Avoid hammers and excessive force.

Can I use a non-original aftermarket strap on this watch?

Yes, provided it respects the 12mm lug width. High-quality aftermarket straps (such as alligator, calf or vegetable-tanned leather) are compatible and often superior in terms of materials and finishing compared to OEM straps. Always verify that the attachment is specifically designed for 12mm.

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

A quality leather strap (alligator or calf) lasts 3–5 years with moderate daily use. Durability depends on frequency of use, sun and humidity exposure, and the tanning method used. A vegetable-tanned strap ages gradually, developing patina whilst maintaining structure. A poorly treated or constantly humid-exposed strap may deteriorate in 18–24 months.