Staudt · Praeludium Automatic

Strap for Praeludium Automatic

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter43 mm
ReferenceP21.031-A02
FamilyPraeludium Automatic
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 Automatic P21.031-A02

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Praeludium Automatic P21.031-A02, seen from the bench

The Staudt Praeludium Automatic features the ETA 2892-A2 caliber with functions of hours, minutes, seconds, and date. The watch has 22mm lugs for the strap. The ETA automatic movement ensures precision and reliability in the essential functions.

Frequently asked questions

What is the lug width of the Staudt Praeludium Automatic P21.031-A02?

The lug width of the Staudt Praeludium Automatic P21.031-A02 is 22mm. This lug width accommodates a broad range of aftermarket straps, from artisanal leather to technical fabrics, whilst maintaining balanced proportions relative to the 42.50mm case diameter.

Which strap pairs best with the Staudt Praeludium Automatic P21.031-A02?

For the minimalist and vintage-contemporary character of the Praeludium Automatic, a strap in vegetable-tanned Tuscan leather, typically 1.4–1.6mm thick, represents the ideal pairing. The patina that naturally develops over time complements the brushed stainless steel case beautifully. Alternatively, a NATO in heavy cotton or nylon offers a consciously sportive interpretation whilst preserving the watch's austere character.

How do I change the strap on the Staudt Praeludium Automatic?

To change the strap on the P21.031-A02, use a quality spring bar tool: insert the tip into the slot on the upper lug, applying gentle pressure to compress the internal spring. Once released, slide the old strap outward. For the new strap, align its ends with the lugs and press gently until you feel the spring bar click back into position.

Is a 22mm aftermarket strap compatible with the Praeludium Automatic?

Yes, any strap with 22mm lugs is fully compatible with the Staudt Praeludium Automatic P21.031-A02. Milanese artisanal straps crafted from vegetable-tanned leather, shell cordovan, alligator, or vulcanised rubber offer the same construction quality as the watch itself. Always verify that the strap ends are cleanly cut to prevent friction against the lugs.

How long does a leather strap last on the P21.031-A02?

A vegetable-tanned leather strap, with moderate daily wear (5–6 days weekly), maintains structural integrity between 4 and 7 years. Longevity depends on humidity, perspiration, cleaning frequency, and tanning method. A shell cordovan strap, owing to superior material density, can last 8–10 years. Periodic maintenance—conditioning with natural balms every 6–8 months—significantly extends service 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.

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