Strap for Speedmaster 57 Co-Axial Stainless Steel / Black Vintage

The lug width is 20 mm. It is measured as the internal distance between the metal attachment pins on the case. This dimension is specific to Speedmaster '57 models and is essential for compatibility with any aftermarket strap.

The ideal material depends on use: vegetable-tanned alligator amplifies retro character while maintaining elegance, vegetable-dyed calf leather offers softness and develops patina over time, a heavy canvas NATO adds sportiness. We recommend shades such as chocolate brown, black, deep burgundy or taupe grey paired with the steel case.

The attachment pins are removed using a dedicated tool (spring bar tool) or a small flat screwdriver. Position the tool in the lateral hole of the inner pin to release the spring and slide the pin out of the case. Replace the old strap and reinsert the pins ensuring they are properly locked. A straightforward operation that requires care.

Any strap or watch strap with a 20 mm lug width is compatible. Online you will find artisanal 20 mm straps ready to ship, customizable in materials, colors, lengths and stitching finishes. We recommend superior quality leathers (alligator, calf) rather than inexpensive synthetics to enhance the case and movement.

A quality leather strap, with vegetable tanning or alligator leather, lasts an average of 3-5 years with daily use before showing obvious signs of wear or requiring replacement. Durability depends on climate, perspiration, sun exposure and daily care. An artisanal vegetable-dyed strap develops a patina that makes it more distinctive over time, improving aesthetically even after two years of intensive use.