Strap for Radiomir 1940 Chronograph Oro Bianco

The lug of the Panerai Radiomir 1940 PAM00520, also known as PAM520 or PAM 520, is 24 millimeters. This measurement represents the standard for Radiomir watches of this generation and corresponds to the distance between the two slots of the case where the strap is anchored. To verify it correctly, measure perpendicularly from one side of the case to the other using a caliper or a millimeter ruler.

For the PAM520 in white gold we recommend alligator in dark shades (black, chocolate brown) or aged calf leather. Alligator creates a formal and refined effect, with regular grain that enhances the precious case. Calf leather offers a more contemporary look and ages magnificently, developing a unique patina over time. Both materials create the visual contrast needed to enhance the essential elegance of the Radiomir 1940.

Changing the strap on the PAM520 is done by removing the spring bars (the metal pins that pass through the case slots). Use a specialized spring bar tool, inserting the tip into the small slot of each pin and applying slow and progressive pressure. Once the pins are removed, the old strap will slide off easily. Insert the new strap, reposition the spring bars and push until you hear a click. If you are unsure, contact an authorized Panerai service center.

Absolutely yes. 24mm aftermarket straps are completely compatible with the PAM520. Choosing a strap crafted by specialized artisans—such as those available at milanostraps.it—allows you to customize your watch according to your aesthetic and functional preferences, while maintaining full dimensional and mechanical compatibility. The 24mm lug width guarantees perfect fit without modifications.

The lifespan of a leather strap depends on use, the material chosen, and maintenance. A quality artisanal alligator or calf leather, used reasonably and subject to occasional cleaning, maintains structural functionality for 3-5 years. Natural aging—the progressive development of patina—is desirable and adds value to the object. Premium straps such as those signed Casati Milano include an 18-month warranty and can be regenerated with reconditioning treatments. Vulcanized rubber, if of superior quality, lasts 7-10 years thanks to the material's resistance.