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The Aquis Date 41.5mm is Oris's volume-production dive tool, built to 300m water resistance with a ceramic bezel and a case size that sits comfortably between sport and everyday wear. Reference 01 733 7766 4135 is the steel-bracelet configuration at the core of the Aquis range, and it competes honestly on specification against watches from Tissot and Longines that cost nearly as much. If you want a Swiss mechanical diver with credible depth rating and genuine brand heritage at this price point, this is the ref to benchmark against.
Oris launched the Aquis in 2013 as a replacement for the TT1 Divers line, repositioning the brand firmly in the sport-watch segment. The 41.5mm case with date was the anchor reference from early production, carried forward through a substantial update in 2020 that brought a redesigned case profile, improved bracelet, and a new crown-lock mechanism. Caliber 733 is a modified Sellita SW200-1 with Oris's proprietary rotor and regulation adjustments; it is a capable if unremarkable movement.
A subset of variants added a helium escape valve at the 9-o'clock position for saturation diving use, though few buyers will ever need it. The dial and strap combinations have proliferated significantly since 2017, making the Aquis one of the most configurable entry-level dive watches in Swiss production.
The bracelet on pre-2020 examples had meaningful play at the links and a clasp that wore quickly; verify link tightness and clasp function before buying used. Crown-lock failure is the most common service issue reported on earlier references: confirm the crown screws down and seats flush without resistance or slop. Dial color consistency varies across production runs, so matching a replacement dial to an existing watch is harder than it looks.
The ceramic bezel insert is scratch-resistant but can chip at the edges from impact; inspect the bezel under light at an angle. Some grey-market examples have been sold with aftermarket bracelets substituted for the factory steel; check that the bracelet end-links are OEM Oris and fit flush against the lugs.
New retail runs roughly $1,550 to $1,800 USD depending on dial and strap configuration. Used pre-2020 examples in good condition trade at $900 to $1,200, while post-2020 references with the improved bracelet hold closer to $1,100 to $1,400. Special-edition and limited dial variants carry a modest premium of $100 to $200 over standard references at resale, though they are not scarce enough to command collector prices.
The Aquis competes directly with the Tissot Seastar 1000 and Longines HydroConquest on price; the Oris carries a slight value edge at resale over Tissot but trails Longines, which benefits from stronger secondary-market recognition.
Caliber 733 (Sellita SW200-1 base) carries an Oris-recommended service interval of five to eight years. An authorized Oris service runs approximately $300 to $450 USD depending on parts required; independent watchmakers familiar with the SW200 platform can typically handle it for $150 to $250 with equivalent quality results. Water resistance resealing should be performed at every service given the dive-watch application.
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The ceramic bezel insert must be one-piece ceramic, not painted aluminum; inspect the insert under light for the distinct texture and hardness difference.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| case | Ceramic bezel insert material and texture | One-piece ceramic insert with uniform matte texture; ceramic hardness resists scratching with a knife blade; color is consistent without metallic sheen | Insert that dents rather than chips when tested carefully; metallic sheen suggesting anodized aluminum; surface texture inconsistent with ceramic |
| case | Unidirectional bezel action | Bezel rotates counterclockwise only; firm detents at each minute position; bezel does not rotate clockwise under any hand pressure | Bidirectional rotation; loose detents that skip positions; bezel that can be rotated clockwise suggesting damaged click spring |
| caseback | Screw-down caseback and water resistance | Screw-down caseback with correct torque; Oris engraving with 300m water resistance rating; caseback threads are clean and undamaged | Caseback that opens without a dedicated wrench; damaged threads; 200m rating on a purported 300m Aquis |
| movement | Cal. 733 (SW200-1 base) Oris-finished | Exhibition caseback shows SW200-1 architecture with Oris-signed rotor; 38-hour power reserve; date at 3 o'clock advances at midnight | Non-Oris-signed rotor; date that advances at noon rather than midnight; movement architecture inconsistent with SW200-1 |
| bracelet | Diver extension in clasp | Oris clasp includes fold-out wetsuit extension; extension folds cleanly and latches securely; Oris logo on clasp body | Missing diver extension; clasp without Oris logo; replacement clasp from non-diver Oris reference |
