Sergej/Taigatrommel forerunner in the CSD was Class T 678, the construction of it was stopped on order of the Komekon, the USSR's Communist Economic Planning Center, because the construction of any dieselloco, stronger than 2.000 HP was to take place within the Soviet-Union. This meant, that CSD Class T 678 was cut short at sixteen locos. T 678 0012 has survived and was seen on 13 May 2012 at the Railway Museum at Luzna u Rakovnika.  
Picture by Leon Schrijvers.Leon2711schrijvers@yahoo.co.uk.