Blancpain Fifty Fathoms Tech Ocean Commitment IV

At 45 mm in grade‑23 titanium and 14.1 mm thick, the case combines strength, lightness, and corrosion resistance—suited for saturation dives and everyday wear alike.The titanium wraps around a sapphire bezel insert set at a slight inward angle for better grip and legibility, especially with diving gloves.

The dial is finished in “Absolute Black,” absorbing up to 97% of ambient light for exceptional underwater contrast. Block-style appliqués and hands filled with Super-LumiNova render timekeeping effortlessly legible, even at depth.Rotational precision comes via a 60-click unidirectional bezel, maintaining the classic Fiveoms timer functionality.

Inside beats Blancpain’s in‑house Calibre 1315A, offering a five-day (120‑hour) power reserve via three-series barrels and ticking at 4 Hz. The movement features a silicon balance spring for magnetic resistance and consistent accuracy over time. The exhibition case-back reveals a gold rotor engraved with the Bleu Ocean Commitment emblem.

Finished on an integrated black rubber strap secured by central lugs, the watch wears more compactly than its 45 mm diameter suggests. Comfort is further enhanced by the ergonomic strap taper and a thoughtful buckle layout

In blending technical dive-grade specs with restrained, refined aesthetics, the Tech Ocean Commitment IV represents Blancpain’s strongest synthesis yet: professional toolwatch pedigree married to refined daily wearability. It also serves as a symbol of purpose—each piece advancing ocean preservation alongside its bold design.