The locomotive no. 8457 was one of 15 Pacific locomotives built by Krauss of Munich to a design by Roland Martens.
The locomotive operated at the Ibero-American Exposition in Seville for 14 months.
The locomotives were put in store during the Spanish Civil War
All the locomotives were bought by a park in Madrid, where one of the set of locomotives was converted to diesel operation.
A Barcelona-based group acquired the locomotives and coaches, hoping to start a railway along the seafront in Mataró.
The next phase of the locomotives history began in October 2015, when a team from the R&ER visited the workshop in Barcelona to investigate the condition of the locomotive. They found that the locomotive is in excellent condition and in a nearly complete state. The boiler and frames are in a condition consistent with the reported low use over the first years of its life in the late 1920s and early 1930s, and subsequent storage, and are effectively ‘as new’.