Tissot · PRX

Strap for PRX Powermatic 80 Stainless Steel / Rose Gold PVD / Silver

Takes 12 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width12 mm
Case diameter40 mm
ReferenceT137.407.21.031.00
FamilyPRX
MovementETA caliber C07.111 hours, minutes, seconds | date
Year2021
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The PRX T137.407.21.031.00, seen from the bench

The Tissot PRX features the ETA C07.111 quartz caliber with hour, minute, second and date functions. The case features 12mm lugs and takes inspiration from the 1970s design. The model is part of the Tissot contemporary collection dedicated to sporty-elegant watches.

Frequently asked questions

What is the lug width of the Tissot PRX T137.407.21.031.00?

The lug width of the Tissot PRX T137.407.21.031.00 is 12mm. This dimension is specific to the 40mm version of the model and was calculated by Tissot to maintain proportional harmony between the case width and the lugs. To verify it correctly, measure from the inner shoulder of one lug to the other, taking into account the depth of the recess. Any aftermarket strap must respect this dimension precisely to ensure correct execution.

Which strap is best suited to the Tissot PRX T137.407.21.031.00?

The choice of strap depends on usage context and personal preferences. An alligator strap with vegetable tanning elevates the perception of luxury and develops a unique patina over time. Vegetable-tanned calf offers daily versatility and a compact surface ideal for those alternating between formal and casual environments. A NATO strap in technical fabric guarantees practicality and the ability to change the watch's character quickly. FKM rubber, finally, is the optimal choice for those who want no compromise between aesthetics and sporting functionality.

How do you change the strap on the Tissot PRX T137.407.21.031.00?

The Tissot PRX T137.407.21.031.00 strap is changed using a spring bar tool, a device that allows you to compress the fixing pin (spring bar) to free the end of the strap from the case lugs. First, position the watch face down on a soft surface; insert the tool into the end of the spring bar, compress gently until the strap is freed; repeat the operation on the other side. To fit the new strap, align the holes with the spring bar and compress until you hear a click. This operation requires patience and care to avoid scratching the case.

Is there an aftermarket strap compatible with the Tissot PRX T137.407.21.031.00?

Yes, any strap with 12mm lug width is compatible with the Tissot PRX T137.407.21.031.00. Milano Straps offers a wide selection of artisanal straps in this size: alligator with vegetable tanning, natural calf, NATO in technical fabric and FKM rubber. All straps are selected to guarantee construction quality and aesthetic coherence with the original Tissot design. Online customisation allows you to choose material, colour and finishes according to your preferences.

How long does a leather strap last on the Tissot PRX T137.407.21.031.00?

The lifespan of a leather strap depends on the material, the tanning method and the intensity of use. A high-quality artisanal alligator strap with vegetable tanning can last 8-12 years with daily wear, developing a patina that increases aesthetic value over time. A vegetable-tanned calf strap has a similar lifespan, typically 7-10 years. Longevity is ensured by proper maintenance: avoid prolonged water exposure, protect against chemical agents and occasionally apply a neutral conditioner. Over time, natural leather ages in a fascinating way, acquiring character and personality unique to the wearer's wrist.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only