The BBF build specifies a custom HUB1280 clone for this Square Bang, with the skeleton chronograph sitting inside white ceramic. The straight-sided case asks for clean corner transitions and evenly seated bezel screws. Those case details are unusually exposed in white, which is why the surface execution matters as much as the movement view.
The Black Magic 821.CI.0170.RX Square Bang Unico is the useful nearby choice: The Black Magic Square Bang shows the shape quietly; white ceramic makes every straight edge more visible.
The white square case is a strong fit for monochrome outfits and contemporary tailoring, where straight edges and the openworked dial can be appreciated at normal distance.