Strap for Hydroconquest Quartz 25

The lug width of the Longines HydroConquest L3.147.4.76.6 is 20 millimetres. This specification is unique to this 25mm model and differs from common standards such as 18mm, 22mm, or 24mm. Respecting this measurement precisely is critical to avoid play or damage to the lug attachments during strap installation.

The optimal strap depends on intended use: vulcanized rubber for authentic aquatic activities (snorkelling, recreational diving), calf leather for refined daily wear, tempered alligator for a robust yet elegant compromise, or fabric NATO for maximum casual versatility. The 25mm case benefits particularly from straps that do not visually overwhelm it.

Remove the watch from your wrist. Observe the spring bar clips on each side of the case (inside the lugs). Using a spring bar removal tool, gently press one spring downward while extracting the old strap's end. Insert the spring into the new strap, aligning the holes, then allow the spring to snap into position.

Yes, provided the strap is specifically constructed for a 20mm lug width. Specialist manufacturers such as Casati Milano and other artisanal workshops offer bespoke 20mm straps of superior quality. Avoid generic internet straps as the 20mm specification is rare and easily confused with 22mm.

A quality artisanal calf leather strap typically lasts 2–4 years with daily wear, depending on exposure to moisture, perspiration, and maintenance. A tempered alligator strap lasts 5–8 years. Vulcanized rubber lasts 3–5 years before elasticity diminishes. With regular care (drying after perspiration, occasional gentle cleaning), longevity increases considerably.