The skeletonized chronograph dial uses black accents and a visible date ring to organize the front-facing display. Its open construction makes alignment and depth part of the appeal, rather than details hidden behind a closed dial. The listed Custom HUB4700 Automatic Chronograph Clone belongs to this exact configuration, and sapphire crystal with anti-reflective treatment sits over the display.
The shape changes how the dial is read. The tonneau case frames the chronograph display vertically, so the hands, date ring and dark accents should be judged together with the bezel rather than as isolated dial details. This creates a very different visual rhythm from a round, closed-dial model and is the reason the 42mm dimension can still feel substantial on the wrist.
The structured black rubber strap completes that contrast. It gives the case a grounded, sport-focused finish and prevents the open dial from feeling separated from the rest of the watch. The useful comparison is therefore not merely round versus tonneau: it is a larger geometric display against a more compact, vertically framed chronograph composition.
Because the dial is open, it benefits from a direct front view as well as crown-side and angled views. Those views make it easier to judge the relationship between the hands, date ring, bezel and tonneau layers without relying on a single dramatic photograph.
