Strap for Hydroconquest GMT 41 Stainless Steel / Green / NATO

The Longines HydroConquest L3.790.4.06.2 features 21mm lug width. This measurement is the standard Longines specification for 41mm dive watch models and is compatible with all straps specifically designed for this width.

The optimal choice depends on intended use. For diving: rubber or NATO. For formal wear: alligator or shell cordovan. For daily versatility: high-quality calf leather with water-resistant finish. All must be 21mm width.

Use a spring bar tool to depress the internal retaining clip whilst gently extracting the bar. Insert the replacement strap ensuring the bar aligns precisely with the lug holes, then allow the spring to seat. Avoid excessive twisting, which may damage the stainless steel lugs.

Yes, any strap with 21mm lug width is compatible. We recommend verifying construction and finish quality to maintain the watch's aesthetic integrity. Artisanal straps provide superior fit for smaller wrists.

A high-quality leather strap with vegetable tanning or alligator skin lasts 3-5 years with daily wear and regular maintenance. Rubber or NATO straps provide longer durability (5-8 years). Key factors: UV exposure, freshwater versus saltwater environment, periodic cleaning.