Strap for Hydroconquest Automatic 39

The lug width is 19 millimetres. This is the standard distance between the lugs connecting the strap to the case of this 39mm model. Any aftermarket strap must meet this specification for a perfect fit without lateral play. To verify the measurement, use a digital calliper positioned between the case lugs.

Strap selection depends on intended use and aesthetic preference. Alligator leather in dark blue or medium brown tones dialogues beautifully with the stainless steel case, offering tactile and visual sophistication. For a more casual appearance and a patina that develops over time, vegetable-tanned calf leather is excellent. For diving or sports use, a structured NATO fabric strap provides practicality and readability. Structured rubber remains the functionally supreme solution for extreme aquatic environments.

The strap is replaced by removing the spring bars connecting the strap to the case. Using a spring bar tool, insert the tip into the small opening of the spring bar and apply gentle pressure until it slides out. Once all spring bars are removed, the strap slides away from the case. The operation is straightforward and requires no expensive tools; however, if you are inexperienced, it is advisable to consult a professional to avoid damage to the spring bars or case.

Yes, any strap with a 19-millimetre lug width is compatible with this model. Milanostraps.it offers a selection of 19mm straps in alligator, calf, NATO, and rubber, all customisable in terms of length, initials, and stitching colour. The Casati Milano atelier also offers the possibility of entirely bespoke creations with sartorial consultation.

The lifespan of a leather strap depends on frequency of use, exposure to sunlight and humidity, and tanning quality. An alligator or calf leather strap with vegetable tanning, used with moderate care and awareness of maintenance—avoiding prolonged immersion and drying after water contact—has an average lifespan of 3 to 5 years before structural failure becomes evident. Higher quality leather tends to develop a fascinating patina during this period rather than deteriorate rapidly. The 18-month warranty offered by the Casati Milano atelier covers construction defects.