(Dapol OLIV004 OLIV004 Class 73/1 73107 'Spitfire' Fragonset Black Electro-Diesel Locomotive (Exclusive Edition). The British Rail Class 73 is a British electro-diesel locomotive. Following the withdrawal and scrapping of the more powerful Class 74 electro-diesels in 1977, the Class 73 was unique on the British railway network until the introduction of the Class 88 electro-diesels in 2017).