Strap for SUB 300 Carbon Whitepearl

The lug width of the Doxa SUB 300 822.70.011.20 is 20 mm. This measurement represents the distance between the lug holes on the case and determines the compatibility of any strap. When measured correctly with a calliper positioned between the case terminals, the value will invariably be 20 mm, a non-negotiable specification for this model.

There is no single 'best' choice, but rather informed decisions based on intended use. For frequent diving: FKM or silicone rubber, offering total grip and guaranteed waterproofness. For daily elegance: vegetable-tanned leather, substantial thickness (natural calf grain), which enhances the orange dial. For tactical versatility: canvas NATO strap, combining practicality with sporty style. All options must feature a 20 mm lug width.

Strap replacement requires two lug pins (approximately 1.8 mm diameter). Procedure: position the watch on a stable support, insert a pin removal tool beneath the pin from one side, apply gradual outward pressure until complete extraction, repeat on the opposite pin, fit the new strap, and reinsert the pins. A specialist atelier such as Casati Milano performs this operation safely without risk to the case.

Any strap featuring a 20 mm lug width is compatible. On milanostraps.it, a complete collection of 20mm straps is available in artisanal leather, NATO, rubber, and shell cordovan, all tested for precise fit on Doxa models. We recommend always verifying the lug width prior to purchase and contacting Casati Milano for fitting and customisation by appointment.

Durability depends on construction quality, tanning method, and use. A substantial vegetable-tanned leather strap, well-maintained and not frequently exposed to water, can last 3–5 years. If subjected to regular diving, lifespan reduces to 1–2 years. A rubber or FKM strap proves more resilient in aquatic environments (5–7 years), whilst canvas NATO offers superior longevity (5+ years). Routine maintenance and timely replacement preserve overall reliability.