Strap for Speedmaster Broad Arrow Co-Axial Rattrapante Stainless Steel / Inverted Panda / Bracelet

The Speedmaster Broad Arrow 3582.51.00 has a lug width of 21 millimetres. This width is determined by the distance between the metal pins that pass through the lugs of the case. To verify this measurement correctly, position a digital caliper perpendicular to the two pins, excluding any decorative elements. At milanostraps.it you will find the complete collection of compatible 21mm straps, customizable according to your preferences.

There is no universal choice, but three excellent options: black-dyed alligator for those seeking austere formal elegance; dark brown shell cordovan for those desiring a natural patina that evolves over time; vulcanized black rubber for those using the instrument in high-humidity environments or sports contexts. The Casati Milano atelier can guide you in your selection by considering your lifestyle and aesthetic preferences.

The strap is changed by removing the lugs from the case by temporarily extracting the spring from each pin. Position the watch on a soft base (felt or rubber mat) to avoid scratches. Use a specific tool (spring bar tool) to compress and extract the spring from one side of the lug; repeat for the other side. Insert the new strap by threading the pins through the lugs, ensuring that the spring is correctly positioned. If you lack experience, contact an authorized service centre.

Any strap with a lug width of 21 millimetres is compatible with this model. Compatibility depends exclusively on width, not on brand of origin. At milanostraps.it the 21mm strap collection includes options in alligator, shell cordovan, calf, rubber and NATO. All straps are handcrafted and guaranteed for 18 months at the Casati Milano atelier.

The lifespan of a leather strap depends on the type of leather and conditions of use. Shell cordovan, with vegetable tanning, maintains structural integrity for 5-8 years of daily use; alligator guarantees similar durability; calf with vegetable tanning has slightly shorter lifespan (3-5 years) in high-humidity environments. A naturally vulcanized rubber strap lasts 7-10 years. Regular rotation between multiple straps extends the life of each one, allowing the leather to settle between uses. milanostraps straps include an 18-month warranty against manufacturing defects.