Strap for Seamaster Aqua Terra 150M Master Co-Axial 38.5 Stainless Steel / Silver

The lug width is 20mm. This is the internal distance between the case lugs. It is essential to measure it correctly by positioning a ruler between the two steel lugs from the internal point of one to the internal point of the other, to ensure compatibility with any aftermarket strap.

Vegetable-tanned alligator is the most sophisticated choice: the pronounced grain and natural patina dialogue perfectly with the teak dial. Aniline calf offers minimalist elegance, while cordura NATO straps deliver practicality and style for recreational use. Siliconed rubber is ideal for humid environments.

The Aqua Terra features an integrated steel bracelet. To replace it with a strap, you must remove the links of the existing bracelet from the case lugs. It is advisable to consult a professional watchmaker or contact Casati Milano for atelier fitting that guarantees precision without risk.

All straps with a 20mm lug width are compatible. It is essential to verify the internal measurement between the lugs in person. Earlier vintage Aqua Terra models may have different lug widths: do not assume compatibility without verification. Consult our catalog of 20mm straps for certified options.

An alligator or calf strap with natural leather, vegetable tanning, and artisanal finishing has a lifespan of 5-8 years if subjected to ordinary maintenance (protection from salt water, drying after humidity, occasional conditioning treatment). Aging is part of the design: the patina that develops is a sought-after characteristic, not a defect.