Strap for Hydroconquest Chronograph

The lug width of the Longines HydroConquest L3.644.4.56.6 is 20mm. This measurement represents the distance between the inner walls of the lugs and is essential for ensuring compatibility with aftermarket straps. Verify with a digital calliper for precision.

For the HydroConquest L3.644.4.56.6, we recommend alligator for formal elegance, gommato vitello for daily durability, vulcanised rubber for intensive aquatic use, or NATO for economic versatility. Choice depends on usage frequency and context: alligator emphasises sophistication, whilst rubber preserves sporting identity and salt resistance.

To replace the strap, you must extract the spring bars from the lugs using a specialised spring bar tool. Position the watch on a soft surface to avoid caseband scratching, insert the tool tip into the bar hole, press slightly and lever downward until the internal spring releases. Repeat for both bars. Professional assistance is recommended.

Yes, the Longines HydroConquest L3.644.4.56.6 is fully compatible with all aftermarket straps in 20mm gauge, provided they are constructed with maximum thickness of 4-4.5mm at the lug fold. Verify that spring bars are standard and the strap creates no lateral oscillation due to excessive rigidity or dimension inaccuracy.

A quality leather strap for the HydroConquest L3.644.4.56.6 has average durability of 18-36 months with daily use, depending on material and maintenance. Alligator outlasts bovine leather; rubber and NATO exceed five years. Factors such as solar exposure, perspiration and humidity accelerate ageing. Casati Milano guarantees 18 months on bespoke straps.