Strap for Seamaster 120M Automatic 36.25 Yellow Gold / Diamond / White

The lug width of the Seamaster 120M 2105.20.00 is 18mm. This measurement is determined by the width of the internal space between the male and female lugs of the yellow gold case. An 18mm strap fits perfectly without any adaptation.

For a 36.25mm Seamaster 120M in yellow gold, we recommend dark brown alligator (which amplifies the sophistication of gold), vegetable-tanned calf leather (which develops a patina synchronized with the aging of gold), or shell cordovan for the ultimate in artisanal refinement.

Use a spring bar tool. Position the flat end under the internal spring of the lug, gently push to release the pressure, and extract the male lug. Then insert the ends of the lug into the new 18mm strap and reinsert into the case lugs until the fixing click.

Yes, any 18mm strap is compatible with the Seamaster 120M 2105.20.00. Milano Straps offers straps online ready for shipment, customizable in leather, sizes and stitching details. For a bespoke experience, the Casati Milano atelier creates custom straps with direct consultation.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 3-5 years of daily use, with the possibility of extension through replacements of small parts such as the <a href="/pages/termine-glossario/deployante">deployment clasp</a>. Vegetable tanning tends to age more elegantly, developing a prized patina. The Casati Milano service warranty is 18 months.