Strap for Aquis GMT 43.5 Stainless Steel / Blue / Calf

The lug width (ansa width) of the Oris Aquis reference 01 798 7754 4135-07 5 24 10EB is 24mm. This measurement, defined as the internal space between the two case lugs, determines compatibility with any artisanal strap of the same width. To verify your measurement, use a digital calliper, measuring perpendicularly to the longitudinal axis of the watch between the two lugs (the lateral appendices of the case).

For the black ceramic and satin stainless steel case of reference 01 798 7754 4135-07 5 24 10EB, we recommend an alligator strap with coarse grain texture, which creates natural aesthetic contrast with the cold geometry of the case. Alternatively, a vegetable-tanned calf leather develops a patina over years, or a nylon NATO in neutral tones (grey, navy, black) for more technical contexts. For authentic water use, artisanal FKM (Viton) rubber guarantees absolute salt water resistance.

To change the Aquis strap, obtain a stainless steel springbar removal tool. Position the watch on a soft surface; with the tool, gently push the elastic spring of the pin inward from the lower end of the lug. Once tension is released, extract the pin by pulling it laterally. Repeat on the other lug. To install the new strap (24mm width), align the new strap holes with the lug holes, then reinsert the pins with the tool, ensuring the elastic spring is fully seated in its housing. Avoid forcing to prevent case damage.

Yes, absolutely. Reference 01 798 7754 4135-07 5 24 10EB is compatible with any strap featuring 24mm lug width, regardless of brand. On milanostraps.it you will find a specialized catalogue of artisanal leather, NATO and rubber straps, all certified for this measurement. We recommend verifying strap thickness (typically 1.4-1.6mm for leather, variable for other materials) to ensure proper ergonomic fit with the lug pin.

The durability of a leather strap depends on material and maintenance. A quality artisanal alligator or calf strap (vegetable-tanned) on a daily-wear watch offers an average lifespan of 4-6 years before replacement is required. Vegetable tanning develops a natural patina that protects the fibres; over time the strap softens but maintains structural integrity. Factors reducing durability include: prolonged salt water exposure, unwashed sweat, extreme temperatures. We recommend periodic inspection, particularly at the pin perforation area, and applying a natural wax conditioner (not silicone) every 6-8 months to maintain flexibility and fibre hydration.