Longines · HydroConquest

Strap for Hydroconquest Quartz 25 Two Tone

Integrated attachment: measurements, the most common questions, and the way to a made-to-measure strap.

Lug width to be confirmed

On this Longines HydroConquest L3.147.3.36.7 the lug width doesn't convince me, and I don't want to give you a number I'm not sure about. Write to me on WhatsApp with the reference or a photo of the watch: I'll check it and tell you myself.

Case diameter25 mm
ReferenceL3.147.3.36.7 (aka: L31473367)
FamilyHydroConquest
MovementLongines caliber L250 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The HydroConquest L3.147.3.36.7, seen from the bench

The Longines HydroConquest reference L3.147.3.36.7 is a dive watch from the Swiss brand's sports collection. It features the L250 caliber with hour, minute, second and date indications. The model is part of the line dedicated to water sports with specific technical features for diving.

Frequently asked questions

What is the best strap for the Longines HydroConquest L3.147.3.36.7?

The optimal strap depends on your intended usage. For formal occasions, alligator in black or cognac brown offers elegance and longevity; for sports styling, vegetable-tanned calf in tobacco colour emphasises functionality; for humid environments, canvas NATO or vulcanised rubber keeps your wrist dry. Your choice reflects the balance between aesthetic preference and practicality.

How do you change the strap on the Longines HydroConquest L3.147.3.36.7?

The strap is changed by removing the two spring bars securing it to the lugs. Using a dedicated spring bar tool or a thin flat implement, push one spring bar inward, releasing it from its seat. Repeat on the opposite side. Then insert the new strap, ensuring both spring bars click firmly into position. The procedure takes minutes and requires no specialist skills.

How long does a leather strap last on the Longines HydroConquest L3.147.3.36.7?

Leather strap longevity depends on material quality, frequency of wear and maintenance. A quality alligator or calf strap, worn daily and subject to routine care (cleaning with damp cloth, protection from excessive moisture), lasts 5-7 years. More delicate leather straps may degrade in 2-3 years. Rubber or canvas NATO straps exceed 10 years of life if not exposed to prolonged UV radiation.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only

The atelier's website: casatimilano.com