Six-cylinder, Sleeve-Valve, 2.326 cm3 Berline Engine Gabriel Voisin was perhaps France's greatest aviation pioneer. In 1907 he built the first practical aeroplane capable of leaving the ground under its own power, and his Avions Voisin company was the first mass producer of aircraft in the world. But the end of WWI in 1918 brought a halt to Voisin's aviation ventures and forced him to look elsewhere to provide employment for his workforce. After experimenting with motorized bicycles and a light cyclecars, Voisin decided to produce an automobile that would be unrivaled for prestige, comfort and speed. The resulting Knight sleeve-valve engined 4.0-litre Voisin M1 appeared in 1919. Voisin kept faith with the smooth and silent sleeve-valve engine and gradually extended its use to the smaller models in the range. In 1927 introduced his first six-cylinder car, the C11, which was powered by a 2.326cc Knight engine. Voisin's most successful model, the C11 and its derivatives remained in production until 1936. A rare survivor of a marque that created some of the most original cars of all time, this C11 Berline has formed part of a private collection in Spain since the 1960s and was previously registered in Madrid with the number 'M-29446'. Noteworthy features include Jaeger instrumentation and large Marchal headlights. The Voisin has not been used for some time and remains in highly original condition, albeit in need of re-commissioning. We are advised that the engine runs and that four new tyres have been fitted. Recently registered in the UK, the car is offered with V5C registration document and old (1940) Spanish registration papers.