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The Aquis Date 36.5mm is Oris's answer to buyers who want a serious dive tool without wearing a hockey puck on their wrist. It carries the same 300-meter water resistance, rotating bezel, and sapphire crystal as the larger 41.5mm but scaled to a case that works on smaller wrists and under a shirt cuff. If you want legitimate dive capability in a proportionate package, this is the ref to buy.
Oris introduced the 36.5mm Aquis Date in 2018, positioning it alongside the 41.5mm rather than below it. The caliber is the Oris 733, a branded and decorated version of the Sellita SW200-1, offering 38 hours of power reserve and reliable daily accuracy. The case architecture mirrors the larger Aquis exactly: same lug shape, same unidirectional bezel, same crown protection.
There have been no significant generation changes since introduction; Oris has kept this reference stable while refreshing dial colorways periodically. Production continues as of 2025.
Inspect the bezel insert for chips or fading, particularly on older ceramic-inlay examples with colored markers. The crown seal is the most common service point on dive watches that actually see water, so ask whether the seller has used it for swimming and whether it has been pressure-tested recently. On pre-owned examples, check the case flanks for polishing: the brushed sides should retain their matte texture, and heavy polishing rounds the lugs noticeably.
The bracelet's folding clasp, while functional, can develop play over time, so open and close it to check for slop. Confirm the dial variant matches the papers if authenticity documentation is present, as Oris has offered this ref in blue, green, and black with differing indices across model years.
New retail runs approximately $1,500 to $1,800 USD depending on bracelet choice, with the rubber-strap configuration at the lower end. Pre-owned examples in excellent condition trade between $1,100 and $1,400, with green dials carrying a modest premium of $100 to $150 over the more common blue. Demand is steady rather than speculative, which means prices are honest and deals exist.
This ref does not attract flippers, so buying used carries low risk of paying an artificial premium.
The Oris 733 (Sellita SW200-1) is serviced on a recommended interval of five to seven years, with a full service running $300 to $500 at an independent watchmaker familiar with Sellita movements. Oris authorized service is available but priced higher, typically $600 and up. Parts availability is excellent given the SW200-1's near-universal use across the industry, so independent service is a practical choice.
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Case diameter mixups are common in listings; verify with a caliper before purchase.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| case | Case diameter | 36.5mm measured with caliper; proportions consistent with smaller Aquis case | 41.5mm diameter; wrong reference mislabeled as 36.5mm |
| caseback | Cal. 733 designation | Oris Cal. 733 engraved; Sellita SW200-1 base with Oris finishing | Non-Oris caliber designation; bare SW200-1 without Oris finishing |
| case | Unidirectional bezel | Unidirectional rotating bezel with correct click and resistance | Bidirectional bezel (belongs on Divers Sixty-Five); incorrect bezel for Aquis |