November 25 (SeeNews) - Stolichen Electrotransport, the municipally-owned tram and trolleybus transport company serving the Bulgarian capital Sofia, said it has signed a 97 million levs ($55.6 million/49.6 million euro) contract with Polish manufacturer Pojazdy Szynowe PESA Bydgoszcz for the supply of 25 trams for the needs of the city.