A diesel locomotive 55179-6, owned by the private railway operator BZK (or BRC - Bulgarian Railway Company) shunting on railway station Pirdop. To date 26.12.2009 year , another diesel locomotive of class 55-00 like this is 55129-1 with grey livery. Digital photo by Veselin Malinov , e-mail: malinov.veselin99@gmail.com. Website: http://nightphotos.fotopic.net