Panerai · Radiomir 1940

Strap for Panerai Radiomir 1940 PAM00520

The Panerai Radiomir 1940 PAM00520 takes 24 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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Lug width24 mm
Case diameter45 mm
ReferencePAM00520
FamilyRadiomir 1940
MovementPanerai caliber OP XXV Hours, Minutes, Small seconds | Chronograph, Column wheel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Radiomir 1940 PAM00520

Selected for the 24 mm lug width · workshop selection

All 24 mm straps →

The Radiomir 1940 PAM00520, seen from the bench

The Radiomir 1940 PAM00520 features a 45mm white gold case with 24mm lugs. It is powered by the Panerai OP XXV caliber with hours, minutes, small seconds, and column-wheel chronograph functions. The movement offers the chronograph complications integrated into the distinctive Radiomir collection design.

Frequently asked questions

What is the lug width of the Panerai Radiomir 1940 PAM00520?

The PAM00520 has 24mm lugs, measured between the inner shoulders of the case. This width respects the historical proportions of the Radiomir line from the 1940s and ensures aesthetic balance with the 45mm diameter. To verify the exact measurement, position a digital caliper between the integrated lugs on the white gold caseback, without applying force.

Which strap is most suitable for the Panerai Radiomir 1940 PAM00520 in white gold?

Alligator crocodile leather is the most appropriate choice for the PAM00520, thanks to its regular grain and golden patina that develops over time, complementing the white gold case. Alternatively, vegetable-tanned calf leather offers a smooth and formal finish. For more sporty use, butadiene rubber or a canvas NATO strap maintain fidelity to the model's military heritage, with chromatic contrast against the precious metal.

How do I change the strap on my Panerai Radiomir 1940 PAM00520?

The PAM00520 uses straight lugs with integrated bars on the caseback. Position the watch on a soft pad and locate the attachment bars on both sides of the case. Use a spring bar tool to gently push the pin until the strap ends release from the bars. Insert the new 24mm strap by aligning the holes with the inner shoulders, ensuring the pin is securely seated. Apply gradual pressure to avoid damage to the white gold case.

Can I use a non-Panerai aftermarket strap on my PAM00520?

Yes, artisanal 24mm-compatible straps are perfectly suitable for the PAM00520, provided they are made from quality materials (alligator, calf leather, technical rubber) and crafted by specialized makers. Verify that the internal width corresponds exactly to 24mm and that the pin holes respect standard Panerai spacing. A bespoke strap allows you to customize the color, stitching thread, and initials, adapting the watch to your wrist.

How long does a leather strap last on the Panerai Radiomir 1940 PAM00520?

A quality leather strap (alligator or calf) typically lasts 4-7 years with daily wear and ordinary maintenance. Durability depends on sun exposure, humidity, frequency of use, and care. Vegetable-tanned leather ages more slowly than chemically tanned leather. To extend its lifespan, avoid prolonged submersion (the PAM00520 is water-resistant to 100m and not suitable for sea swimming with a leather strap), clean regularly with a soft cloth, and occasionally apply conditioner formulated for fine leather. Technical rubber typically lasts 5-10 years under normal conditions.

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

The atelier's website: casatimilano.com