Strap for Seamaster Aqua Terra 150m Master Co-Axial 38.5 Stainless Steel / Yellow Gold / Silver / Bracelet

The lug width of this model is 20mm. This measurement represents the distance between the pivots of the case attachments where the strap is installed. It is essential to measure this width correctly to ensure compatibility with aftermarket straps and preserve the original aesthetics of the two-tone case.

The choice depends on the intended use. To emphasize the dress-sport aspect, we recommend a natural alligator strap in cognac or brown, which amplifies the warmth of the yellow gold case. For daily versatility, a vegetable-tanned black calf offers elegance and develops patina over time. For summer or nautical use, a navy NATO strap or an FKM rubber strap maintains the watch's adventurous character.

Strap replacement requires a specific tool to remove the retaining pins from the attachments. Place the watch on a soft support, locate the small hole at the end of each lug and, using a spring bar tool, push the pin until it extracts. Repeat for the other attachment, then insert the new strap by aligning it with the lugs before reinserting the pins. If you are not experienced, we recommend entrusting this to a professional.

Any strap with a 20mm lug width is compatible with this model. At milanostraps.it you will find a wide selection of artisanal straps in 20mm size, made in alligator, calf, shell cordovan and rubber, customizable in colors, initials and stitching thread. Atelier Casati Milano also offers bespoke creations by appointment.

The lifespan depends on the leather quality and intensity of use. A high-quality alligator or vegetable-tanned calf strap lasts 3-5 years of daily wear, developing a natural patina that enhances its aesthetic value. Exposure to sun, sweat and water accelerates aging. Artisanal straps from milanostraps.it include an 18-month warranty and can be refurbished or replaced at Atelier Casati Milano.