Elegant in its symmetry. Refined in its detail. Relevant in its strong horological focus. Nebula 40 Steel is a one-of-a-kind skeleton timepiece in which Arnold & Son combines style and substance, movement and design. The star-shaped arrangement of its seven bridges and even its name, Nebula, create a coherent system: the radiating concept that governs the form of Nebula 40 Steel and determines its structure, topography and depth. Following the launch of Nebula 40 Steel in black and a golden edition celebrating 260 years of John Arnold’s legacy, a blue version is joining the variations on this skeletonised timepiece. Radiating towards the centre, the bridges are arranged around the edge of the main plate, itself formed of intersecting curves.