Oris · Aquis

Strap for Aquis Date 43.5 New York Harbor Limited Edition II

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width23 mm
Case diameter44 mm
Reference01 733 7789 4187-Set
FamilyAquis
MovementOris caliber Oris 733 hours, minutes, seconds | date
Year2025
CaseMother of Pearl | Ceramic, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Aquis 01 733 7789 4187-Set, seen from the bench

The Oris Aquis Date 43.5 New York Harbor Limited Edition II features a 43.50 mm stainless steel case with a ceramic bezel and mother-of-pearl dial. It is powered by the Oris 733 manual caliber movement with hours, minutes, seconds, and date function. This professional diver model is water-resistant to 300 meters (ISO 6425 certified) and requires a 23 mm lug width for strap compatibility, a critical specification for aftermarket customization on this oversized case.

Frequently asked questions

What is the lug width of the Oris Aquis 01 733 7789 4187-Set?

The lug width of the Oris Aquis 01 733 7789 4187-Set is 23 millimetres. This measurement is taken from the upper attachment point to the lower attachment point of the spring bar mechanism. It is a critical specification for aftermarket strap selection, as even a 1 mm error would result in either excessive play or difficulty in fitting.

What is the best strap for the Oris Aquis 01 733 7789 4187-Set?

The ideal strap depends on intended usage. For discrete elegance, we recommend vegetable-tanned calf leather in cognac or shell cordovan in burgundy, which create a pleasant aesthetic dialogue with the mother-of-pearl dial. To maintain the diver spirit, a navy NATO strap or a pressurised rubber strap are the most coherent choices. All must feature a 23 mm lug width for compatibility.

How do I change the strap on the Oris Aquis 01 733 7789 4187-Set?

Strap replacement is achieved by removing the spring bar that secures the strap to the case. Using a small screwdriver, gently push the spring bar inward, extract the old strap, and insert the new one, ensuring it aligns perfectly with the 23 mm lug width. It is advisable to perform this operation on a soft, clean surface to avoid scratching. If in doubt, consult a professional watchmaker.

Is an aftermarket 23 mm strap compatible with this model?

Yes, any aftermarket strap with a 23 mm lug width is compatible with the Oris Aquis 01 733 7789 4187-Set, provided that the attachment conforms to the spring bar standard used by Oris. Compatibility is solely determined by lug width: it is essential to verify this before purchase to avoid errors.

How long does a leather strap last on a watch like this?

The lifespan of a leather strap depends on the material and conditions of use. A quality vegetable-tanned calf strap, worn daily in normal conditions, has an average lifespan of 3 to 5 years before replacement is necessary. Prolonged exposure to water (the model is a 300 m diver) reduces longevity; in that case, a pressurised rubber strap is preferable. The natural patina that develops over time is part of the character of an authentic leather strap.

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