Strap for Prospex Diver Marinemaster 300 Stainless Steel / Black / Bracelet

The Seiko Prospex Divers SBDX017 MM300 features a lug width of 20mm. This dimension refers to the distance between the spring bars to which the strap is attached. Always verify this measurement before purchasing an aftermarket strap to ensure perfect compatibility.

Selection depends on intended use. For professional diving operations, we recommend vulcanised rubber or nylon NATO: they dry quickly and withstand saltwater exposure. For elegant daily wear, alligator with vegetable tannage or robust calf leather in deep tones offers versatility and develops patina over time. A stainless steel deployant paired with quality leather ensures ease of operation.

Remove the watch from your wrist and position the case on a soft surface. Using a spring bar removal tool, gently press the spring mechanism from inside, lifting the pin upwards to extract it from the lug. Once the pin is freed, the old strap releases. Align the new strap's holes with the lugs, reinsert the pin from the opposite side and verify secure locking. This straightforward procedure requires only care and proper tools.

Absolutely. Any strap manufactured with a 20mm lug width is compatible with the SBDX017. We recommend bespoke artisanal straps specifically engineered for this width: they guarantee superior construction quality, consciously selected leather and details such as stainless steel deployants that harmonise with the case. Quality aftermarket straps develop patina and character over time, enriching the timepiece.

Longevity depends on tannage and material composition. Vegetable-tanned alligator averages 2-3 years with daily use and regular conditioning (cleaning, moisturising). Robust calf leather lasts 3-4 years, especially with moderate humidity exposure. Vulcanised rubber straps can exceed 5 years, even in humid environments. The 44.30mm case creates considerable load on the strap: select generous thicknesses (minimum 1.4-1.6mm) to ensure durability.