Hi! Me again... This East-German model from Roco, called 120, was a very common model in the Eastern block during the 70´s and 80´s. They are still in use in some former East European countries.
The nickname "Taigatrommel" (djungeldrum) comes from its very noisy engine. No exhaust at all...
So think like this... A cold night i january 1972... Just outside East-Berlin... Under a bad light... Regards Jonas