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Oris · Aquis

Strap for Aquis Date Calibre 400 43.5 Stainless Steel / Blue / Rubber

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

Lug width

23mm
23 mm strapsAll Oris
Lug width23 mm
Case diameter44 mm
Reference01 400 7790 4135-07 4 23 45EB
FamilyAquis
MovementOris caliber Oris 400 hours, minutes, seconds | date
Year2024
CaseCeramic, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

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The Aquis 01 400 7790 4135-07 4 23 45EB, seen from the bench

The Oris Aquis Date Calibre 400 is a 43.5mm stainless steel sports watch with a 23mm lug width, launched in 2015 and refined through successive iterations. It features an in-house Oris Caliber 400 movement providing hours, minutes, seconds, and date with 38 hours of power reserve. The case combines stainless steel with ceramic elements for scratch and corrosion resistance, with a transparent caseback, and offers 300 meters of water resistance.

Frequently asked questions

What is the lug width of the Oris Aquis 01 400 7790 4135-07 4 23 45EB?

The lug width of this Oris Aquis model is 23mm, a non-standard dimension that requires custom-made straps. This width is specific to this reference and forms part of its original technical identity.

Which strap is most recommended for the Oris Aquis 01 400 7790 4135-07 4 23 45EB?

For this timepiece with a 43.5mm stainless steel and ceramic case, we recommend alligator leather or vegetable-tanned calf for everyday elegance, or NATO and rubber straps for sports use. Your choice depends on usage context and personal style. Milano Straps offers all these options in 23mm width.

How do you change the strap on a watch with 23mm lugs?

The process is straightforward: use a small plastic tool (supplied with most quality straps) to release the spring-bar lugs from their holes. Position the tool between the lug and case, push gently downward and the strap will detach. Repeat on the other side, then insert the new strap in the same manner.

Are aftermarket straps available that are compatible with 23mm lug width?

Yes, Milano Straps offers a comprehensive selection of artisanal straps in 23mm width, made to order. You can choose from leather, vegetable-tanned calf, shell cordovan, NATO and rubber, all customisable in styles and colours.

How long does a leather strap last on a watch like the Oris Aquis?

A quality leather strap, with proper maintenance, typically lasts 5-7 years of daily use, longer if rotated with other straps. Durability depends on tanning method (vegetable-tanned ages better), frequency of use and moisture exposure. Since the Oris Aquis reaches 300m water resistance, avoid prolonged immersion with leather straps.

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