The Nebula 40 Steel Blue Edition by Arnold Son is a skeleton watch that immediately draws the eye with its star-shaped structure and rich blue tones. The seven bridges radiate outwards in perfect symmetry, giving the watch its name and distinct character. This design isn’t just for show, it supports the entire movement, creating a sense of depth and order that feels both technical and artistic. Building on earlier versions in black and gold, this blue edition adds a fresh, modern edge while keeping the elegance that defines the Nebula line.
Inside, the A&S5201 calibre is laid out along four axes of symmetry, with twin barrels offering an impressive 90-hour power reserve. The balance and small seconds are neatly aligned to keep everything visually centred. Even the crown mechanism has been shifted to the back of the case for better symmetry on the dial side. These details reflect a real effort to bring harmony to both the design and mechanics of the watch.
What brings it all together is the color and finishing. The blue PVD treatment adds richness to the main plate, while the steel components—finished in palladium—catch the light with a cool, clean shine. The mix of brushed and polished surfaces brings out the details without overwhelming the eye. Whether it’s paired with a blue alligator strap, a rubber band, or a steel bracelet, the Nebula 40 Steel Blue Edition feels balanced, refined, and quietly confident.
