Longines · HydroConquest
Strap for Hydroconquest Quartz 41 Black / Red Rubber
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the HydroConquest L3.689.4.59.2 (aka: L36894592)
Selected for the 20 mm lug width · workshop selection
Vintage Black Calfskin Leather Strap€80
Hammered Calfskin Strap Light Blue€98
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Vintage Olive Green Calf Leather Watch Strap€80
Hammered Black Calfskin Strap — Ecru Stitching€98
The HydroConquest L3.689.4.59.2 (aka: L36894592), seen from the bench
Frequently asked questions
What is the lug width of the Longines HydroConquest L3.689.4.59.2?
The lug width is 20 millimetres. Measure by placing a calliper between the two horizontal lugs protruding from the case. This specification is essential when purchasing a compatible strap.
Which strap is recommended for the Longines HydroConquest L3.689.4.59.2?
It depends on intended use: for water activities, saturated rubber or resilient NATO is advisable; for daily elegance, brown alligator or vegetable-tanned calf leather; for extreme practicality, NATO in Cordura textile. All must feature a 20mm lug width.
How do I change the strap on the Longines HydroConquest L3.689.4.59.2?
You will require a lug removal tool: position it beneath the lug and gently push the pin upward. Once removed, the old strap slides free. Insert the new strap and reinsert the pins, ensuring they are firmly seated.
Can I use an aftermarket compatible strap?
Yes, provided it has a 20mm lug width and total length between 70 and 75 millimetres for comfortable fit. Always verify that the pins possess the correct diameter and that materials do not damage the satin-brushed case.
How long does a leather strap last on this watch?
With regular maintenance (drying after moisture exposure, protective cream 2-3 times yearly), an alligator or vegetable-tanned calf strap lasts 3-5 years. If frequently exposed to salt water without cleaning, durability reduces to 12-18 months.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only