Strap for Seamaster Diver 300M Automatic 41 Titanium / Blue

The lug width is exactly 20mm. This is the internal distance between the two lugs of the case. The 2991.80.93 maintains a tight manufacturing tolerance to ensure proper fit on artisanal straps without lateral play.

For formal wear, slate grey alligator enhances the titanium case and creates monochromatic harmony. For versatility, cognac calf leather with vegetable tanning develops patina synchronized with titanium. For certified diving, vulcanized rubber or polyamide NATO straps are the technical choice, maintaining elasticity across wide temperature ranges.

Remove the watch from your wrist. Using a flat-tipped tool or strap removal tool, gently push downward on the spring bar latch on one side, lift the lug from the case. Remove the old strap. Insert the new strap lug into the slot and snap the latch into place. Repeat on the other side. Verify the strap alignment along the case axis.

Yes, any strap with 20mm lug width is compatible. We recommend verifying construction quality and material selection (for diving, avoid leathers that release tannins). Atelier Casati Milano creates custom straps with personal leather selection and 18-month warranty.

With moderate use (1–2 dives monthly), a quality alligator or calf leather strap lasts 3–5 years. Vulcanized rubber resists for 4–7 years. Critical factors are salt exposure (request post-dive rinsing), temperature, and frequency of use. A well-maintained strap ages with character rather than degrading.