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

The lug width of the Speedmaster Broad Arrow 321.93.42.50.13.001 is 20 millimetres. This dimension is specific to this model and determines the exact width of the strap to be paired with it. To verify, measure the space between the internal lugs of the case using a calliper: the result must be 20mm to ensure proper strap insertion.

The choice depends on use and aesthetic context. Dark Mississippi or Louisiana alligator creates formal contrast with rose gold; vegetable-tanned calf develops natural patina over time; shell cordovan offers organic graining and visual depth; textile NATO in olive or grey balances the volumetric weight of the 42mm case. For formal contexts we recommend alligator or cordovan; for daily wear, aged calf.

Use a spring bar tool to extract the elastic pins that hold the strap to the lugs. Gently push the tool towards the inside of the pin, lifting the strap from the lugs. Insert the new 20mm strap by aligning the passant to the lugs, then reinsert the elastic pins until they click into place. Verify that the strap is positioned symmetrically on both sides.

Any strap with a 20mm lug width is compatible with the Speedmaster Broad Arrow 321.93.42.50.13.001. On milanostraps.it you will find a complete collection of artisanal 20mm straps in alligator, calf, shell cordovan, NATO and rubber, all customisable and selected to enhance the aesthetic of the chronograph.

Durability depends on material and use. A vegetable-tanned calf strap typically lasts 3-4 years with daily wear, developing characteristic patina. Shell cordovan reaches 5-7 years due to its superior natural density. Alligator varies between 3-5 years. Casati Milano guarantees 18 months on all artisanal straps made to measure, with the option of future replacement of the inner lining to further extend service life.