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

The Omega Speedmaster Broad Arrow 3882.31.37 has a lug width of 21 mm. This standard is determined by the case geometry of 44.25 mm and ensures correct proportions between case and strap. To verify compatibility, measure the distance between the two lugs protruding laterally from the case with a digital caliper—the value must be exactly 21 mm.

For the industrial aesthetic of the Broad Arrow, we recommend black alligator with medium grain, which pairs perfectly with the brushed steel case. Equivalent quality alternatives are burgundy shell cordovan for those wanting elasticity and natural patina, black vegetable-tanned calf for warm climates, and dark grey rubber for intensive daily use without maintenance.

Remove the original strap using a thin lever tool (without a hammer). Position the watch with the case facing down, locate the pins holding the strap to the lateral lugs and push slightly upward to release the pin from the hole. Repeat on the other side. Insert the new strap by aligning the pins with the lug holes and pushing until they snap into position—the operation takes less than a minute.

Yes, any strap with a 21 mm lug width is compatible with the Broad Arrow 3882.31.37. Verify that the strap is designed for a watch of at least 44 mm in diameter—small straps may appear visually disproportionate. On milanostraps.it you will find 21 mm artisanal straps with personalization in leather, initials and stitching thread.

The lifespan of a leather strap depends on the material and usage. Alligator lasts 3-4 years with moderate daily wear, shell cordovan 4-5 years thanks to superior fiber-structural density, vegetable-tanned calf 2-3 years if frequently exposed to moisture. Rubber lasts 5-7 years if not exposed to extreme temperatures. All Casati Milano straps come with an 18-month warranty against manufacturing and material defects.