Strap for SUB 300T Aquamarine / Bracelet

The Doxa SUB 300 840.10.241.10 features a 20mm lug width, determined by the distance between the two case lugs. This measurement ensures correct aesthetic proportion with the 42.50mm case diameter and is essential for mechanical compatibility. Any strap with 20mm lug width pairs perfectly with this model.

The optimal strap depends on intended use: for formal wear, dark brown vegetable-tanned leather creates elegant contrast with the orange dial; for recreational diving, black rubber ensures complete water resistance; for daily versatility, a robust textile NATO offers durability without maintenance. A stainless steel 316L deployant buckle complements any choice.

To change the strap: 1) place the watch on a soft surface; 2) locate the lateral pins connecting the strap to the case; 3) apply gentle pressure to one pin using a small tool, extracting it; 4) remove the old strap; 5) align the new strap lugs with the case holes and reinsert the pins. If uncertain, consult a professional watchmaker.

Yes, any strap from milanostraps.it collection with specified 20mm lug width is fully compatible with the Doxa SUB 300 840.10.241.10. Straps are available in alligator leather, calf, textile NATO, and rubber—all ready to ship and customisable to preference.

A vegetable-tanned leather strap typically lasts 3-5 years with daily wear, developing visible patina within the first 6-12 months. Longevity depends on maintenance (drying after immersion, avoiding prolonged sweat exposure without cleaning) and frequency of wear. For recurring marine environments, rubber is recommended for superior durability. Premium calf leather ages elegantly for 5-7 years before requiring replacement.