Dual Color Rubber Strap for Longines Conquest, HydroConquest L3.781/L3.741/L3.782 – 21mm

There is a version of the Longines Conquest and HydroConquest that lives on the original steel bracelet. Precise, polished, and entirely correct. And then there is the version that wears a dual-colour silicone strap — the same movement, the same case, the same dial, but with an energy the bracelet was never built to carry. The Longines Conquest / HydroConquest Dual Color Silicone Strap is for that second version: a 21mm two-tone band that doesn’t change what the watch is, but changes entirely how it reads on the wrist.

The Same Watch. A Completely Different Personality.

• Silicone rubber — the material that earns its place on a sport watch — silicone doesn’t merely tolerate active environments; it is indifferent to them. Pool water, ocean salt, gym perspiration, summer heat — none of it registers on the material, none of it shows on the surface, and none of it shortens the strap’s working life. What remains is a band that performs without maintenance and looks correct doing it.
• Precision 21mm fit across the L3.781, L3.741, and L3.782 — the dual-colour design is only effective if the strap sits where it’s supposed to. At 21mm cut to the exact Conquest and HydroConquest lug specification, this strap seats without play or gap at the case — the colour transition begins at the lug edge and runs true to the buckle, exactly as it should.
• 90mm + 90mm — balanced by design — equal sections aren’t a manufacturing shortcut; on a two-tone strap they are a compositional decision. The symmetry ensures the colour split reads consistently from both sides of the wrist, and the combined length covers the full adjustment range from slimmer to broader wrists without excess at either end.
• 19mm folding buckle — the closure a daily-wear strap deserves — at 19mm it sits in correct proportion to the 21mm strap width, neither overwhelming the band visually nor leaving a gap at the edges. The folding mechanism opens cleanly, holds securely, and reduces the stress concentration at the buckle hole that pin buckles create over time — keeping the strap in better condition across years of daily use.
• Dual-colour aesthetic — intentional, not incidental — the two-tone construction gives the Conquest and HydroConquest a visual register they don’t have on bracelet or single-colour rubber. It reads contemporary without chasing trends, and bold without overreaching — a strap that adds character to the watch rather than competing with it.

Two Colours for Two Sides of the Same Watch.

The Conquest and HydroConquest have always been watches that move between contexts — the boardroom and the pool, the weekend and the working week. The dual-colour strap leans into the more active, expressive side of that range. It is not the configuration for every occasion; it is the configuration for the occasions where the steel bracelet feels like the wrong register entirely.

This strap is the right choice for:

• Wearers building a two-strap rotation — the dual-colour band and the steel bracelet cover opposite ends of the Conquest’s personality spectrum, giving the watch two completely distinct identities without a second case.
• Active lifestyle wearers who want a strap that performs in water and sport environments but doesn’t look like every other rubber band in the gym or at the pool.
• Design-conscious buyers drawn to watches and accessories that reflect a considered aesthetic — the two-tone construction signals intent in a way that a plain black rubber strap simply cannot.
• HydroConquest owners with coloured dials — blue, green, and black dial variants in particular find natural colour partners in a dual-tone strap that picks up one of those dial tones without trying to match it exactly.

Specifications

Two colours. One strap. The Conquest you didn’t know you were missing — add to cart now.