Strap for SUB 300 Whitepearl

The Doxa SUB 300 821.10.011.23 features a 20mm lug width. This measurement represents the distance in millimetres between the two spring bars that connect the strap to the case. It is essential to measure this dimension accurately before purchasing an aftermarket strap: an incorrect measurement would result in incompatibility or strap instability on the wrist.

The choice depends on intended use. For frequent diving: FKM rubber or neoprene, resistant to salt water and chemical agents. For daily elegance: alligator with vegetable tanning or shell cordovan, creating a compelling contrast with the sports case. For versatility: NATO strap in cotton and polyamide, easily interchangeable and comfortable on the wrist.

Strap replacement requires a specific tool to compress the spring bars (lateral pins). Position the watch on a stable surface, gently compress the right pin inward toward the case until it exits the lug hole, then remove the strap. Repeat the operation on the other side. To install the new 20mm strap, insert the pins into the lug holes, ensuring the strap is completely seated and the pins are aligned.

All straps with a 20mm lug width are compatible. On milanostraps.it you will find a selection of leather straps (alligator, calf, shell cordovan with vegetable tanning), NATO straps in technical materials, and FKM rubber straps for diving use. Each is tested and ready for dispatch.

Durability depends on material quality and usage. An alligator or calf strap with vegetable tanning has an average lifespan of 3-5 years with daily use. Frequent exposure to salt water (diving) significantly reduces durability: in this case, it is advisable to alternate leather and rubber straps, preserving the leather. With proper maintenance (rapid drying and occasional conditioning), longevity can be extended.