Olimpia Ολυμπία , August 1986. Photo Pierre B
I guess that the carriages are built in the former GDR. I wish I had taken a picture of the wagon at the rear of the train, but of course I did not

Pirgos Πύργος , August 1986. Photo Pierre B
I guess that the carriage on the left and that on the right are built in the former GDR. The carriage in the centre appears to be of Romanian origin. This is just guesswork based on some of the components such as the windows. I may be mistaken.