Staudt · Praeludium Petit

Strap for Praeludium Petit

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter37 mm
ReferenceP31.011-A02
FamilyPraeludium Petit
MovementETA caliber 2892-A2 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

Straps for the Praeludium Petit P31.011-A02

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Praeludium Petit P31.011-A02, seen from the bench

The Staudt Praeludium Petit features the automatic ETA 2892-A2 caliber with hour, minute, second and date indications. The watch has 20mm lugs for the strap. The ETA 2892-A2 movement offers a power reserve of approximately 42 hours.

Frequently asked questions

What is the lug width of the Staudt Praeludium Petit P31.011-A02?

The lug width (ansa width) of the Staudt Praeludium Petit P31.011-A02 is 20mm. This measurement is essential for purchasing a compatible strap: the strap must be specifically designed for this width to fit correctly into the case lugs.

Which strap is recommended for the Praeludium Petit?

For the Praeludium Petit P31.011-A02, leather straps of superior quality (alligator, vegetable-tanned calf) are recommended, along with NATO straps in robust fabric for sportier applications, and natural rubber straps for humid environments. The choice depends on intended use and desired aesthetics: leather guarantees classical elegance, NATO introduces versatility, rubber maximises practicality.

How do you change the strap on this watch?

To change the strap, remove the spring bars or pins that anchor the strap to the case lugs. Using a specialised tool (spring bar tool), insert it delicately between the pin and lug, pressing inward to release the spring. Once the old strap is removed, insert the new one by aligning the pins with the case attachments and pressing until the locking click is felt. If tools are unavailable, consult a professional watchmaker.

Can the original Staudt strap be replaced with an aftermarket 20mm strap?

Yes, the original 20mm strap of the Staudt Praeludium Petit P31.011-A02 can be replaced with aftermarket straps of equal width and comparable quality. It is essential to verify that the new strap measures exactly 20mm between the pins and is fabricated from appropriate materials (natural leather, NATO, rubber) to preserve the watch's aesthetic integrity.

How long does a natural leather strap last on a daily-wear wristwatch?

A natural leather strap of superior watchmaking quality, with vegetable tanning, maintains functionality and appearance for 3-5 years of daily wear. Durability depends on intensity of use, climate (humidity and heat accelerate deterioration), and maintenance (avoid prolonged water exposure, apply conditioner periodically). The leather develops a natural patina over time, increasing its aesthetic value until replacement becomes necessary.

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