The bridges of the calibre are palladium-treated, giving a sheen that echoes the steel case. The main plate, barrel covers, and dial flange have been coloured with a blue PVD treatment. The Nebula 41.5 Steel is fitted with either a steel bracelet or a rubber strap with a woven-look surface. The two-tone aesthetic adorns the interior and exterior, the substance of the watch and the details.