Orenstein & Koppel (normally abbreviated to “O&K”) was a major German engineering company specialising in railway vehicles, escalators, and heavy equipment. It was founded on April 1, 1876 in Berlin by Benno Orenstein and Arthur Koppel. This Orenstein Y Koppel – Arthur Koppel S.A. steam locomotive from 1898 comes the Spanish branch Madrid-Barcelona-Bilbao.
