in 1949–1950. Three diesel railcars of class 81 were delivered from Ganz Works in 1941 and additional four of class 82 in 1952 for long distance passenger trains. In the 60s and 70s the traffic became too busy for the steam engines and railcars, so in 1965 and 1966 ten diesel engines were delivered from Henschel AG. They are working as class 75 and are still in service now. Most of the steam engines were transferred to the Cherven bryag–Oryahovo line. In these years there were more than 10 trains (passenger, freight and mixed) daily in each direction. Ten engines of class 77 were delivered in 1988 from 23 August Works of Bucharest, Romania, but five of them were sold to RFIRT (now YCF), Argentina in 1996. Before this delivery, some engines class 76 also had been working on the Septemvri–Dobrinishte railway while the others were based on the Cherven bryag–Oryahovo railway. Steam locomotive 60976 is the only preserved in working condition and used for tourist trains. Since 2003 there is only passenger service with three trains per day in each direction. As of 2016, there are now four trains running the entire length of the line each day. The current plan can be found on the website of Bulgarian State Railways. In 1982, Bulgarian industry ordered 10 narrow-gauge shunting diesels of Soviet locomotive class ТУ7 (TU7E) (BDŽ class 81) from the Russian Kambarka Engineering Works. Gallery See also List of highest railways in Europe References Maltchankoff, St. "The Region of Nevrokop", Mir newspaper, (in Bulgarian), February 2, 1920, http://newspapers.nalis.bg/mir/ Deyanov, D. "80 years of narrow-gauge railway Septemvri–Velingrad", Railway transport magazine (in Bulgarian), Vol. 7-8, 2006 . Deyanov, D. Railway network in Bulgaria 1866–1975 (in Bulgarian), Sofia 2005, . Deyanov D, Deyanov S. Locomotives of Bulgarian state railways (in Bulgarian), Sofia 2008, . Further reading Paul Engelbert: Schmalspurig durch Bulgarien, Verlag Stenvalls, Malmö 2002, Rudolf Heym: 125 Kilometer auf schmaler Spur, Lok-Magazin 4/2008, ISSN 0458-1822 External links Gallery of photos from a journey on the Septemvri–Dobrinishte line Bulgaria - TU7E (series 81 БДЖ) Wyprawa koleją z Septemvri do DObriniszte Poland 760 mm gauge railways in Bulgaria Pazardzhik Province Blagoevgrad Province