Did the JZ really have this type of car transporter, and did Roco produce the model in this livery or is it a repaint?
Stefan-GB, Roco has never done a JZ version of this car, this is my work, conversion into JZ on Roco basis:
Answer to your first question: yes, there were these type of cars during JZ era. To be more precise, 20 pieces built 1987. in Yugoslavia, but only for directorate Zagreb (for domestic and international traffic). 1999. some of them were modified into closed type of autotransporter, Croatian Railways (HZ) still has got a very few pieces in its active rolling stock (my photo):