Vibrant arcs of color sweep across this intimate gouache and stencil study, capturing Robert Delaunay at the height of his mature Orphist vision. Created in 1936 as a preparatory work for the Pavillon des Chemins de Fer at the Paris International Exposition of 1937, the composition demonstrates how Delaunay translated his signature simultanéisme into large-scale public commission work, using rhythmic color contrasts to evoke the dynamism and modernity of rail travel. The stencil technique lends the forms a crisp, almost industrial precision that feels entirely fitting for a project celebrating technological progress, while the gouache medium keeps the palette luminous and immediate. Studies of this kind occupy a particularly compelling place within Delaunay's practice, serving as the conceptual bridge between theoretical ambition and monumental execution. The 1937 Exposition was among the most significant public platforms of the interwar period, and Delaunay was entrusted with decorating several pavilions, cementing his status as France's preeminent painter of modern life and movement. A signed work of this provenance carries both documentary and aesthetic weight, offering collectors direct access to the artist's working process at a pivotal moment in twentieth-century decorative arts history. At just 21 by 36.5 centimeters, the sheet rewards close attention, its compact format belying the spatial ambition the forms project. The work is presented unframed, allowing the new owner full latitude in choosing a presentation suited to their collection. For those drawn to the intersection of modernist painting and the great civic commissions of the 1930s, this study represents a rare and tangible connection to one of the defining artistic undertakings of the era.