Strap for Seamaster Aqua Terra 150M Master Chronometer Small Seconds 38 Stainless Steel / Sedna Gold / Sand - Diamond / Alligator

The lug width of this model measures exactly 19 millimetres. This measurement should be verified internally between the upper lugs using a digital calliper. You can contact our team for a free compatibility check before purchasing a strap.

For a two-tone watch, we recommend a tortoiseshell or pearl grey shoulder alligator leather, which creates visual cohesion without competing chromatically with the case. Alternatively, a vegetable-tanned ebony calf leather with gold thread stitching emphasizes the elegance of Sedna gold, while a navy NATO strap maintains balance with a subtle maritime character.

The Aqua Terra features integrated lugs that house removable spring bars. For safe replacement, use a dedicated spring bar remover tool, inserting it gently from the bottom. If you are not experienced, Casati Milano offers replacement service by appointment with watchmaking precision and post-service verification.

Yes, any strap with a 19mm lug width is mechanically compatible. However, true aesthetic compatibility depends on materials, colours and construction quality. We recommend verified artisanal straps rather than generic products to preserve the value and elegance of your watch.

A quality artisanal alligator or calf leather strap, with vegetable tanning, can last 3-5 years of daily wear before requiring replacement. Longevity depends on sun exposure, humidity and perspiration. Casati Milano offers an 18-month warranty and consultancy on maintenance and conscious leather ageing.