Strap for Speedmaster Broad Arrow 1957 Stainless Steel / Red Gold / Brown / Bracelet

The lug width (also called lug size or lug width) is exactly 20 millimetres. This dimension is the standard compatibility specification for all straps designed for this model. Always verify by measuring the distance between the pins protruding from the case: the acceptable tolerance is between 19.8 and 20.2 millimetres to ensure precise installation.

For a case in rose gold and steel, fine-grained alligator is the canonical choice: the subtle texture does not compete with the bicolour complexity of the case, and the natural patina that develops over time creates continuous aesthetic evolution. For those seeking maximum durability, shell cordovan offers superior wear resistance and develops an almost mirror-like lustre. Vegetable-tanned calf represents the ideal compromise between visible ageing aesthetics and structural robustness.

The change requires the use of a spring bar tool. Locate the pins situated at the lug ends (in the seat between case and current strap), gently press them inward to release the strap, remove it and insert the new one by aligning the pins with the seats. Verify that the pin is fully inserted: it must click into position. If you are uncertain, consult a specialist watchmaker to avoid scratches on the case.

Yes, certified 20mm straps are compatible. Compatibility is guaranteed by compliance with the international standard: the pins must enter the case seats with a tolerance between 19.8 and 20.2 millimetres. However, always verify construction quality: an inexpensive strap may have imprecise tolerances. Artisanal straps from milanostraps.it include QC (quality control) that certifies the precision of the lug width.

Durability depends on the material and usage. Quality alligator, with proper care (regular cleaning, avoiding prolonged moisture), lasts 5-7 years before showing signs of structural failure. Shell cordovan, due to its superior density, easily reaches 8-10 years. Vegetable-tanned calf ranges around 4-6 years. Replacement is not a construction defect, but a natural part of the life cycle of an artisanal leather strap.