Oris · Aquis

Strap for Aquis Date 36.5 Stainless Steel / Brown / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter36.5 mm
Reference01 733 7731 4156-07 8 18 05P
FamilyAquis
MovementOris caliber Oris 733 hours, minutes, seconds | date
CaseCermet, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Aquis 01 733 7731 4156-07 8 18 05P

Selected for the 20 mm lug width

All 20 mm straps →

The Aquis 01 733 7731 4156-07 8 18 05P, seen from the bench

The Oris Aquis Date 36.5mm model 01 733 7731 4156-07 8 18 05P is a stainless steel diving watch with a 36.50mm case and integrated bracelet. It features an Oris 733 automatic movement with date function and a Cermet bezel that resists corrosion. The 20mm lug width accepts aftermarket straps and ensures precise compatibility when measured between the steel lugs.

Frequently asked questions

What is the lug width of the Oris Aquis 01 733 7731 4156-07 8 18 05P?

The lug width measures exactly 20mm, defined as the distance between the two steel pins that protrude from the case lugs. Always verify this specification before purchasing an aftermarket strap to ensure proper fit and eliminate unwanted play.

What is the best strap choice for the Oris Aquis 36.5mm?

Selection depends upon intended use. For formal elegance, vegetable-tanned leather—alligator, calf, or shell cordovan—in cognac or deep brown delivers refined results. For humidity and water resistance, premium gummed rubber with fine grain is uncompromising. NATO straps in ballistic canvas emphasise the diving heritage whilst keeping the case as visual protagonist.

How do I change the strap on an Oris Aquis watch?

Changing the strap requires a spring bar tool. Position the tool's flat end beneath the spring bar, press gently downward until the bar disengages, then slide the old strap away. Thread the new strap through both lugs, aligning the holes precisely, and press the bar until it clicks into position. Perform this operation with patience to avoid case damage.

Which aftermarket straps are compatible with the 01 733 7731 4156-07 8 18 05P?

All straps manufactured with a 20mm lug width are compatible. Milano Straps curates a specialised selection: exceptional leather (alligator, calf, shell cordovan in vegetable tanning), NATO straps in technical fibres, and premium rubber options. Confirmation that the pin-to-pin distance equals exactly 20mm is essential before purchase.

What is the typical lifespan of a leather strap on a wristwatch?

Lifespan varies considerably based on tanning method and usage intensity. A vegetable-tanned leather strap, properly maintained and treated periodically with natural oils, typically lasts 5-7 years. Gummed rubber, cleaned regularly, exceeds a decade. Rotating amongst multiple straps significantly extends longevity by reducing exposure to sweat and moisture stress.

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