Strap for Speedmaster Broad Arrow 1957 Stainless Steel / Black / Bracelet

The lug width is exactly 20 millimeters. This dimension is measured between the axes of the pins (lugs) that attach the strap to the case. It is essential to verify this measurement before purchasing an aftermarket strap, as even a 1 millimeter deviation causes misalignment and strap-change issues.

For this chronograph icon, we recommend alligator for sophistication and evolved patina, shell cordovan for tactile viscosity and natural luster, or vegetable tanning for those who prefer constructive purism and visible temporal trace. Smooth calf remains the versatile and reliable base for any context.

Using a spring bar tool (instrument with a two-pronged tip), position it under the pin (spring bar) that connects the strap to the case lug, then apply gentle outward pressure until the pin is released from its slot. Repeat the operation on the other pin. Insert the new strap by aligning the holes with the pins, then push until you hear a click. Never force the case.

Yes, any strap with a 20mm lug width is compatible. Verify that the strap is constructed with sufficient robustness for the weight of the case (42mm stainless steel). Consult the 20mm strap catalog for options already tested on similar models, or contact Casati Milano for a custom-made personalized creation.

Durability depends on the material and usage. Alligator and shell cordovan offer 3-5 years of daily wear before showing signs of structural failure. Vegetable tanning can last longer, developing a natural protective patina. With a custom-fitted deployant, the strap does not develop additional holes, further extending its life. Maintenance (gentle cleaning, air drying) preserves leather integrity.