This is a very old type trolley car driving at the streets of Plovdiv, (Bulgaria). Picture is taken from an illustrated album about the city. Probably one of the first type of trolleys-  a soviet model and make, which had ran in Plovdiv.  The year is somewhere at the late 60’s or the early 70’s.
Photo by: M. Houng; e-mail: grebnata@abv.bg