Strap for Seamaster Aqua Terra 150m Co-Axial 43 Annual Calendar Stainless Steel / Silver / Bracelet

The lug width of this model is 21mm. It is measured from the center of the spring bar pin on one lug to the center of the spring bar pin on the opposite lug. It is essential to respect this measurement to ensure perfect case fitting and secure wear.

Vegetable-tanned alligator is the most elegant choice: it enhances the wave texture of the dial and develops a natural patina over time. Barenia calf offers a more casual approach, while a NATO ensures sporty versatility. The choice depends on your use: formal, everyday, or aquatic.

Obtain a spring bar tool. Position the tip into the small slot of the lug pin, lift gently to release the internal spring, and slide the pin out. Repeat on the other side. Insert the new strap by slightly compressing the spring of the pin into the new strap and inserting the pin into the lug. The procedure requires care to avoid scratching the case.

Yes, as long as it respects the 21mm lug width and is constructed with fine materials. High-quality handcrafted alligator or calf leather straps do not compromise the watch; they enhance your personal style. Milanostraps offers compatible 21mm straps, customizable in leather, thread color, and initials.

A high-quality leather strap (vegetable-tanned alligator or barenia calf) will last 3-5 years with daily wear. Durability depends on sun exposure, humidity, sweat, and maintenance. Periodic protective treatment and rotation with other straps extend the lifespan. The Casati Milano warranty is 18 months on custom straps.