Tissot · PRX

Strap for PRX Quartz Stainless Steel / Red

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
ReferenceT137.410.11.421.00 (aka: T1374101142100)
FamilyPRX
MovementETA caliber F06.115 Hours, Minutes, Seconds | Date
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 T137.410.11.421.00 (aka: T1374101142100), seen from the bench

The Tissot PRX T137.410.11.421.00 is a contemporary icon reinterpreting 1970s Swiss watchmaking aesthetics with a tonneau case designed by Franc Muller in 1978 and faithfully revived in 2022. It features a 40.00mm stainless steel satin-finished case, 8.45mm depth, black dial with applied indices, Mercedes hands, and date window at 3 o'clock. Powered by the ETA F06.115 quartz calibre, it offers 100-meter water resistance. The 12mm lug width is essential for strap compatibility and represents the precise geometric specification for this model.

Frequently asked questions

What is the lug width of the Tissot PRX T137.410.11.421.00?

The lug width of the Tissot PRX T137.410.11.421.00 is precisely 12mm. This dimension is determined by the distance between the integrated lugs on the tonneau case and admits no variation. Any aftermarket strap must respect this geometric specification to ensure a secure fit without lateral play and certified wearing safety.

Which strap would you recommend for the Tissot PRX T137.410.11.421.00?

The ideal strap depends on the intended context. For formal elegance, we recommend satin-finished black alligator or vegetable-tanned calfskin in cognac-brown tones. For daily and sports wear, cotton ripstop NATO straps in grey or navy preserve the retro aesthetic of the design. For warm climates, vulcanised rubber offers practicality without stylistic compromise. Milano Straps offers all these solutions in 12mm, ready for immediate shipment.

How do I change the strap on my Tissot PRX?

Changing the PRX strap requires a spring bar tool. Position the watch on a stable surface with the case facing upward. Gently insert the tool into the lateral groove of the pin, lift until the internal spring releases, and extract the pin from the first lug. Repeat on the other side. Insert the new strap by aligning the holes with the pins and press until the safety click is heard. Verify that both sides are securely fastened before wearing the watch.

Are Milano Straps aftermarket straps compatible with the PRX?

Yes, all 12mm straps from Milano Straps are fully compatible with the Tissot PRX T137.410.11.421.00. Each handcrafted strap is manufactured to the precise specifications of the lug width, ensuring accurate attachment to the integrated case pins. We recommend personally verifying the width before ordering, but Milano Straps certifies compatibility for this reference across the entire 12mm collection.

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

The durability of a handcrafted leather strap depends on usage conditions, tanning method, and climate. A vegetable-tanned calfskin strap, worn daily in moderate environments, maintains structural integrity for 18-24 months before replacement becomes necessary. Alligator, thanks to its more robust grain, can exceed 24-30 months. Exposure to perspiration, salt water, and UV radiation accelerates ageing. To maximise lifespan, allow the strap to rest at least one day per week and occasionally apply natural conditioner (avoiding mineral oils).

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