Aquis Small Second

The Oris Aquis Small Second 45.5mm carves out a niche in the Aquis lineup with its distinctive sub-dial at 9 o’clock and purposeful design for serious diving. This model is prized among collectors who value both function and style, as it’s one of the few Aquis variants to offer a small seconds complication alongside a prominent 500-meter water resistance. The large, confident case size gives it presence on the wrist and marks it as a tool watch with real underwater credentials, not just a desk diver.

Key reference numbers like 01 743 7733 4155 (blue dial) and 01 743 7733 4135 (black dial) differ primarily in dial color and strap options, with both powered by the reliable Oris Calibre 743 (based on the Sellita SW220-1). The small seconds display isn’t just a visual flourish—it offers enhanced legibility under water, making it a favorite among divers who appreciate at-a-glance checks. Value is driven by condition, completeness (box, papers, original strap/bracelet), and dial/strap combinations, with the blue dial variants often commanding a premium.

When shopping for the Aquis Small Second, check that the ceramic bezel and screw-down crown operate smoothly, as these are critical for maintaining water resistance. Earlier models may lack the latest quick-adjust clasp, so decide if that feature matters for your use. This model is not commonly counterfeited, but demand for certain colorways can lead to price swings on the secondary market—especially for full sets in near-mint condition.